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Because your heart needs oxygen the most when it is working the hardest

angina is most likely to occur during exercise.
b.
a. the hardest angina are most likely
the hardest angina is likeliest
C. the hardest, angina is most likely
d. No change is needed.
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Answer: Angina attacks can be prompted by exertion or physical exercise, when the hard-working heart muscle requires greater amounts of oxygen.

Step-by-step explanation:

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