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Sonja [21]
3 years ago
5

If your heart is not strong enough or efficient enough, it is difficult to

Health
2 answers:
Sati [7]3 years ago
8 0
If your heart isn't efficient,or not strong enough, you will have difficulty breathing. 
sergeinik [125]3 years ago
3 0
Answer A. and C.

you need blood flow to make you stronger
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