Which of the Following Statements Illustrates a Potential Cost of Sexual

Which of the following statements illustrates a potential cost of sexual reproduction?

A) Proteins in the seminal fluid of Drosophila males shorten the life expectancy of inseminated females.
B) Female birds of paradise inspect several males before deciding who to mate with.
C) Male and female damselflies form characteristic mating wheels, which allow the partners to fly, albeit at slower speeds than single damselflies.
D) All of the above