Problem: David is an environmental scientist. He needed to find causes of wildfires and suggest preventive measures. First, he visited a dense forest. He marked it as location A. Then he visited a grassland, which he marked as location B. After that, he visited a location where he did not find any sign of drought. He marked it as time A. He then visited the same location a year later, and found that the place was facing a severe drought. He marked it as time B. Which place would have higher ambient temperature, locaion A or location B?

A: location B

Problem: Two college groups did a one year experiment on each other. One group called Group Alpha spend more time and worked together. Group Beta let it's members study on their own and be less dependent on the group. Group Alpha had better results. Which group experienced increased confidence?

A: Alpha

Problem: Two cousins both have chronic viral infections. Tim has Kaposi's sarcoma-associated herpesvirus, while Nate has the EpsteinBarr virus. Which cousin has a greater chance of developing Kaposi's sarcoma?

A: Tim

Problem: Mark and Ken were taking a lunch break. Mark bought some fast-food from a major chain, while Ken ate an egg salad and pork he got from his aunt. Mark got norovirus and hepatitis A virus. Ken got sick because he got infected with Giardia and trichinella. Which person will experience and inflammation of the liver?

A:
Mark