[Q]: Mary and Ann are mother and daughter. Mary is in her 70's while Ann is in her late 40's. They both work out regularly for improved health. Mary has been experiencing some health issues lately. Which person experienced a decrease in strength?
****
[A]: Mary

[Q]: Hannah and Joe are two colleagues. They both study horticulture. They've been studying ants lately for their entomology class. Hannah studied ants that farm aphids, while Joe studied ants that farm fungus. Which student learned more about ants fighting off aphid predators?
****
[A]: Hannah

[Q]: David needs to purchase a camera for his photography class. He went to the local consumer electronics store to find himself a good camera. Two cameras caught his eye, camera A and camera B. Camera A had a very small pinhole, but camera B had larger aperture. David needs to decide which camera should he buy. Which camera would have lower f-number focusing lens, camera A or camera B?
****
[A]: camera A

[Q]: Last week, John visited the national park near his city. He saw many flowers. His guide explained him that there are two categories of flowers, category A and category B. Category A flowers spread pollen via wind, and category B flowers spread pollen via animals. Would category A flower have higher or lower efficiency of fertilization than category B flower?
****
[A]:
lower