Knowing how to easily manipulate the people around you. Not exactly a good thing though.
Make it attainable by setting a more realistic expectation.
Answer:
A: Sleeplessness in both genders.
B: Acne in both genders.
C: Testicular shrinkage in men.
D: Deepening of the voice in women.
Explanation:
"A: Sleeplessness in both genders" is the answer.