Q: Read the following article and answer the question. Article: The world's largest solar thermal plant is set to begin producing power in the United States by the end of the year. Wind and energy from the sun are generally considered clean, unlike energy from coal-burning power stations. However, environmentalists now worry that too much solar power development could harm the local environment. A California company -- BrightSource Energy is building a huge solar power plant in the Mojave desert, about 60 kilometers southwest of Las Vegas, Nevada. The plant is known as the Ivanpah Solar Electric Generating System. Joe Desmond works for the company. "This is actually one of the highest concentrations of sunlight in the world, out here in Ivanpah." explained Desmond. BrightSource Energy will deploy 170,000 specially designed mirrors to direct solar energy towards boilers on top of three power towers. The steam produced in the boilers will drive turbine to make electricity. Joe Desmond says the steam can reach temperatures of more than 260 degrees Celsius. "We can store the sun's thermal energy in the form of molten salt, so we can produce electricity even when the sun goes down. There is a lot of interest in concentrating solar power around the globe in environmnents where you have lots of sun, such as China, South Africa, the Middle East, North Africa, explained Desmond. Environmentalists generally support the idea of solar power, however, many are concerned about the effect of power plants on sensitive environment. Lisa Belenky is a lawyer with the Center for Biological Diversity, a private group. She says environmentalists are specifically worried about the effect of the Ivanpah Solar Project on the sensitive plant and animal life in that part of Mojave desert. "Even though the desert seems big, when you start cutting it up, it can really affect how the species and the animals and the plants are able to survive in the long run,"said Lisa Belenky. BrightSource Energy has already spent more than $ 50 million to move endangered desert tortoises away from the power plant.... Question: Why can the plant make electricity at night? Answer:

OPTIONS:
- Because the sun's thermal energy can be stored in the form of steam.
- Because the sun's thermal energy can be stored in the form of molten salt.
- Because the sun'ss thermal energy can be stored through mirrors
- Because the sun's thermal energy can be stored in the boilers.

A: Because the sun's thermal energy can be stored in the form of molten salt.

input: OPTIONS:
- There are guides for nature trails.
- Tourists can easily visit the whole park within a day.
- The camping fees at the nine camping grounds are different.
- Tourists must take park and trail maps with them when they visit the park Now, answer this question: Read the following article and answer the question. Article: Visiting Joshua Tree National Park, California Joshua Tree National Park is nearly 800,000 acres large and surrounds parts of the Mojave and Colorado Deserts in South-central California. Although deserted at first sight, the park is full of wildlife and provides a variety of entertainment activities from hiking to climbing. Within a three-hour drive, Joshua Tree National Park takes at least a full day to visit. Things to do Hiking opportunities within the park include several choices, from 12 self-guided nature routines to all-day back-country hikes. Joshua Tree NP has nine camping grounds, and back-country camping is also allowed. Rock climbing is a popular activity in the park, which has 10 mountains greater than 5, 000 feet in height. When to visit Joshua Tree NP is open 365 days a year, although the best time to visit is October through April, when temperature is milder. The peak season is when the wild flowers bloom, and the summer months are the least crowded. What to bring In addition to your camera and telescope, be sure to carry lots of water. Park and guiding maps can be picked up at any of the three visitor centers. Fees Parking fees: You can buy a seven-day vehicle permit for $ 15, a single entry permit for $ 5, or Joshua Tree National Park annual pass for $ 60. Camping fees: They vary by camping ground Question: What can be inferred from the text? Answer:
A:
output: The camping fees at the nine camping grounds are different.

Problem:OPTIONS:
- He couldn't produce enough for the suppliers.
- The creditors wouldn't lend him any money.
- His products didn't sell well.
- He might run into bankcruptcy.

Read the following article and answer the question. Article: The business executive was deep in debt and could see no way out. Creditors were closing in on him. Suppliers were demanding payment. He sat on the park bench, head in hands, wondering if anything could save his company from bankruptcy . Suddenly an old man appeared before him. "I can see that something is troubling you." he said. After listening to the executive, the old man said: "I believe I can help you." He asked the man his name, wrote out a check, and pushed it into his hand saying: "Take this money. Meet me here exactly one year from today, and you can pay me back at that time." Then he turned and disappeared as quickly as he had come. The business executive saw in his hand a check for $500,000, signed by John D. Rockefeller, then one of the richest men in the world! "I can settle all my debts in a moment!" he realized. But instead, the executive decided to put the uncashed check in his safe, just knowing it would give him the strength to work out a way to save his business. With renewed optimism, he made better deals and extended terms of payment. He closed several big deals. Within a few months, he was out of debt and making money once again. Exactly one year later, he returned to the park with the uncashed check. At the agreed-upon time, the old man appeared. But just as the executive was about to hand back the check and share his success story, a nurse came running up and grabbed the old man. "I'm so glad I caught him!" she cried. "I hope he hasn't been bothering you. He's always escaping from the rest home and telling people he's John D. Rockefeller." And she led the old man away by the arm. Question: What was the executive worried about? Answer:
****
A:
He might run into bankcruptcy.