Question: If blue whales have trouble finding any mates
Choices:
text: they could become overpopulated
label: A
text: their population could drop to the sum of negative two and two
label: B
text: they could all become sharks
label: C
text: they could mate with killer whales
label: D
Answer: B
Fact: if all members of a species cannot produce offspring then that species will likely become extinct