Problem: John is a doctor at the children's hospital. He had two different cases to investigate, case A and case B. In case case A, a baby continued to suckle mother's milk. But in case B, a baby stopped suckling mother's milk. He had to determine the different effects these two cases were causing. In which case more prolactin would be released, case A or case B?

A: case A

Problem: John has to live in the tundra for six months. He is preparing for the harsh arctic winter. He bought three bags of foods, bag A, bag B, and bag C. He kept bag A on his table top. Just out of curiosity, he applied the sugaring method he learned from the internet on bag B and bag C foods. Afterwards, he kept the bag B foods in a place with no moisture, and the bag C foods in a place with high moisture. Which foods would more likely to subject to fermentation, bag B or Bag C?

A: bag C

Problem: India decided to use fossil fuels to produce their electricity, and Nepal decided to go renewable and use only hydro power to produce their electricity. Which country released less greenhouse gas into the atmosphere?

A: Nepal

Problem: When comparing village A from ten thousand years ago to village B from today, we reached the conclusion that today's villagers release much more carbon into the atmosphere by their activities. Which village cleared more land?

A:
village B