David collects cigarette packs of different years. He found that two of his packs, pack A and pack B, are very different. Pack A is from before September 2012, and pack B is from after September 2012. He started searching on the internet to find out why the packs were different. Which pack would be less efficient at communicating dangers of smoking, pack A or pack B?
Ans: pack A

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 less difficulty in keeping a steady supply of oxygen during their marathon?
Ans: Timothy

Two brothers born three years apart were very different. Jim had no genetic abnormalities, while Danny had Klinefelter's syndrome. Which brother had trisomy X?
Ans: Danny

The Doctor studied two teams of people. Team N had no viral infections, while Team W had many people with HIV among its members. Obviously, team N had fewer health issues. Which team had fewer people receiving interferon?
Ans: team N