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a. regular excercise
b. sunbathing
c. food
d. water
e. vitamin supplements

2007-04-26 05:47:50 · 2 answers · asked by Anonymous in Science & Mathematics Biology

2 answers

C

2007-04-26 05:51:40 · answer #1 · answered by Soccer Tease 4 · 0 0

c

2007-04-26 05:54:33 · answer #2 · answered by hcbiochem 7 · 0 0

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