Rob is experimenting with how air pressure works. To that end, he has designed two tests. In the first test the air flow works as it would in an airplane wing. He labels it as case A. In the second test the air flow works as it would in a race car spoiler. He labels it as case B. He is surprised to see that air flow behaves differently in different situations. In which case the resultant push of the air pressure would be upward, case A or case B?
----
Answer: case A

Big continent used more air polluting substances, while Small continent was very protective towards the environment. Big continent got a hole in its ozone layer as a consequence of their actions. Which continent used fewer chlorine gasses?
----
Answer: Small

Two groups of people participated in a geriatrics study. group D had people over 65 years old, while group Y had people in their 40's in its composition. Which group had people at lower risk of developing cancer?
----
Answer:
group Y