An activity is considered cardiovascular exercise if it
a. lasts ten minutes or longer
b. stretches the muscles
c. increases muscular strength
d. none of the above

The answer is d. none of the above.  When it is cardiovascular it refers to activities that increases one’s heart rate.  These are activities increases the amount of oxygen in our cells to burn fat in our bodies.  Examples of cardiovascular exercises are running, biking, walking and aerobics.

the answer to your question is: family members who abuse drugs.

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what are the options