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4. Which of the following practices best maintain a healthy respiratory and circulatory systems?
I. Exercise twice a year
II. Avoid fatty substances
III. Drink alcohol
IV. Sleep 7-9 hours a day

A. I, II, and III
B. I, III and IV
C. I and IV
D. II and IV​


Sagot :

Answer:

D. ii and iv

ii.avoid fatty substance

iv.sleep seven to nine hours a day

Answer:

D. Avoid fatty subtances and sleep 7-9hours a day