ANSWER is muscular strength. Weight lifting does not require a lot of energy and is mainly meant to build more muscle. Flexibility deals with how much the body can stretch. Cardiovascular fitness is high in energy and makes your heart beat at a fast rate. Body composition is what your body is made up of
Components of a Comprehensive Exercise Program. The optimal exercise program will address health related physical fitness components of CRF, muscular strength, endurance, flexibility, body composition, and neuromotor fitness.
If there is no response and not breathing or not breathing normally, position the infant on his or her back and begin CPR. Give 30 gentle chest compressions at the rate of 100-120/minute. Use two or three fingers in the center of the chest just below the nipples.
source :CPR Instructions For Infants and Small Children
depts.washington.edu/learncpr/infantcpr.html
The answer to this question would be "A" I believe.