Problem: Monica and Jill are two friends. They study and party together most of the time. One day Monica shared a needle with a drug addict at a party. She later found out that she'd been infected with HIV. Jill was scared and helped her as much as she could. Which friend doesn't have the virus that causes Acquired Immunodeficiency Syndrome?

A: Jill

Problem: There is a local election in Troy's city and he is researching the two candidates running for mayor. Troy is a strong environmentalist who believes, above all else, that taking care of the Earth is the number one priority in anything. In his research he decides to read the environmental proposals of each candidate. Mark Hampton, one candidate, has a proposal that he says will strongly boost the city's economy by opening more industrial factories, but these will increase the carbon dioxide put into the atmosphere. Jeffrey Lindell, the other candidate, says that he wants to begin implementing solar panel farms to generate electricity to cut down on the carbon emissions the city produces. Which candidate's proposal will cause an increase in global temperature?

A: Mark Hampton

Problem: David was studying the processes involved in a machine. He collected a simple machine. He tagged it as case A. To compare it with compound machines, he collected two compound machines, case B and case C. Case B is a compound machine with few simple machines. And, case C is a compound machine with many simple machines. Would case B have greater or smaller mechanical advantage than case A?

A: greater

Problem: Doctors studied two groups of patients. Group W which had people with sickle cell disease, and group A which had normal people in it. Which group had fewer individuals with genetic abnormalities?

A:
group A