Which of the Following Would Not Be Considered an Example

Multiple Choice

Which of the following would not be considered an example of a trade-off?

A) Brightly colored male guppies are more successful at acquiring mates than other males but are more likely to be killed by predators.
B) Humans that carry the e4 allele for the Apo-E gene are at greater risk than individuals without this allele for acquiring Alzheimer's and coronary heart disease.
C) Rats that are resistant to the poison warfarin have an increased need for vitamin K.
D) All of the above
E) None of the above