Contraceptive methods can be behavioral, barrier, or hormonal. which of these is a barrier method of contraception?
a. birth control patch
b. birth control pill
c. birth control sponge

The best way to get vitamins and minerals is to  a.  eat more fruits than vegetables.    b.  drink as much fruit juice as possible.    c.  take vitamin supplements.    d.  eat a balanced diet.

Which respiratory measurement as useful in differentiating between obstructive and restrictive pulmonary dysfunction

What are three characteristics of positive self esteem?