[Q]: Robert and his brother Timothy are both marathon runners. As marathon running is an endurance event, a key component is being able to replenish your oxygen supply by taking frequent breaths. This week, Robert is running a marathon in Colorado, which has low air pressures. Timothy is also running a marathon, but he is running in Florida, which has high air pressures. Who will have more difficulty in keeping a steady supply of oxygen during their marathon?
****
[A]: Robert

[Q]: Keith is a biotech scientist. He had developed a GMO crop that he labeled as crop A. To see how his GMO crop compare with another crop he selected crop B. Crop B was a non-GMO crop. Keith needed to find the pros and cons of both crops. Which crop would more likely raise food labeling concerns, crop A or crop B?
****
[A]: crop A

[Q]: David is an entomologist. He recently got interested in ants and their behaviors. To that end, he studied a group of ants, which be labeled as case A. To compare ants with other ant like creatures he studied another hymenopteran group, which he labeled as case B. Moreover, he noticed two distinct trails made by the ants, trail A or trail B. Trail A was followed by many ants, but trail B was abandoned by them. Which trail would more likely indicate a food source, trail A or trail B?
****
[A]: trail A

[Q]: Timber village started a channelization process by draining all the swamps near their village. Hill village situated 10 miles to the south, left their swamps untouched. Which village took a less protective approach towards the environment?
****
[A]:
Timber