Ageing is not itself a problem justify this statement

Which action best increases one’s stamina a) exercising when you feel like it b) saving so much that one like sleep c) refusing to exercise to save the energy needed to work d)exercising on a regular basis

Which of these is most likely to prevent pregnancy? a. tracking of female body temperature to identify ovulation times b. proper condom use c. male withdrawal before ejaculation d. proper spermicide use

So i have a lot of answers answered but it says i still need to answer more questions. why is it doing that? how many questions need to be answered?