Problem: Sam and Ned went on vacation, The 2 friends partied nights and spent their days on the beach. Sam started getting flu like symptoms, so he went to the doctor's office where he found out that he was infected with HIV. Ned got scared when he heard what happened, but fortunately he was OK. Which friend contracted a virus that originated in sub-Saharan Africa during the 20th century?

A: Sam

Problem: Bill and Paul were farmers. Bill used insecticides to get read of aphids, while his buddy farmer Paul didn't. Which farmer dealt with more aphids resistant to pyrethroids?

A: Bill

Problem: Jake and Todd used different farming methods to produce their crops. Jake always tills his land, while Todd uses he no-tillage method. Which farmer didn't provide a good environment for insects?

A: Jake

Problem: There was a carnival game at the fair that allowed you to win a basketball if you could correctly guess which of the two balls had spun around a circular track more times. Each ball would be dropped into identical circular tracks and then a curtain would cover them. Ball A would then spin around the track a certain amount of times, and Ball B would spin around a certain amount of times. After they were done spinning, you had to guess which ball completed more revolutions. A boy came up and had no idea how to figure out the answer, but when he picked them up he noticed that Ball A was slightly warmer than Ball B. Which ball completed more revolutions?

A:
Ball A