I know that the answer is D, but why would it be D

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Which of the following is a common response to cell signaling?

What would most likely happen if a person increased the amount of saturated fat in his or her diet? the person's risk of cardiovascular disease would increase. the person's risk of cardiovascular disease would decrease. the person's bad cholesterol would decrease. the person’s good cholesterol would increase.