Problem: In 2016, the subtropical ridge across North America migrated far enough northward to begin monsoon conditions across the Desert Southwest from July to September, but in 2017 the atmosphere dried out across the Desert Southwest, causing a break in the monsoon regime. Therefore a wet year was followed buy a dry one, and the fires started again. Which month of the year was drier, July 2017 or October 2016?

A: July 2017

Problem: David is a doctor who works for the public health department. After analyzing health data for his city, he found twenty percent of the population have myopia. He categorized them as group A. Another eighty percent didn't have myopia. He put them in group B. He now needs to devise a plan on how to tackle myopia in his city. Which group would more likely have visual stress, group A or group B?

A: group A

Problem: John and Keith are neighbors. They have been pondering about how to communicate with each other in a doomsday scenario when all the electronic devices would be useless. They connected their houses with three ducts. One of the ducts is filled with air; they called it channel A. Another duct is filled with water; they called it channel B. And the last duct is filled with iron; they called it channel C. They can now transmit sound with these channels of communication; in case, disaster strikes. How many times faster is channel B than channel A, 4.3 times or 15 times?

A: 4.3 times

Problem: Two coastal cities were affected by a cat 5 Hurricane. Red city took the full impact, but Purple city, situated 40 miles inland, avoided the brunt of the damage. Which city experienced more flooding from the storm surge?

A:
Red