Answer:
a. to prevent pregnancy until you get a steady job may include all but the permanent methods, preferably the more effective ones
b. to space children about three years apart pill or other hormone-based contraceptive
c. immediately after unprotected sex morning-after pill
d. if you have objections to or problems with using hormone-based contraceptive condom, diaphragm, female condom, spermicide
e. if you have objections to hormone-based and sperm-barrier methods fertility awareness