Problem: A pharmaceutical company is trying to find the cure for allergy. To that end, they conducted an experiment with two groups of subjects, group A and group B. They exposed the participants in group A to allergen, but they didn't expose the participants in group B to any allergen. The symptoms of these two groups would help them find the cure for allergy. Which group would not get itchy rash, group A or group B?

A: group B

Problem: Bill is working in a sound studio recording sound effects for a short film that he is working on. Some of the sounds he captured have a very high frequency and others are very low frequency. When he is done he begins to edit the sound with a computer program. Do the high frequency sounds have a longer or shorter wavelength than the low frequency sounds?

A: shorter

Problem: The underwater fishing teams picked their spots early. Team Bob went at the mouth of the river, where the freshwater met the salty seawater in the hope that more turbidity from the river and more nutrients will attract more fish. Team Dan went south where they knew there was less of a thermocline, so they could catch fish without taking risks. Which team had their crew members to fewer risks than necessary?

A: Dan

Problem: Tim and Dan both studied reproduction in college. Dan studied plant reproduction while Tim studied fish reproduction. Which person studied more about the ways fish eggs get fertilized?

A:
Tim