decreasing his respiration rate increasing his perspiration rate increasing the rate his heart beats decreasing the rate his blood flow
I gave my students this multiple choice question: When Javier exercises, his muscle cells need more oxygen. Which would help Javier's muscle cells receive more oxygen?

Only one answer is correct among these 4 choices:
- decreasing his respiration rate
- increasing his perspiration rate
- increasing the rate his heart beats
- decreasing the rate his blood flow

Could you tell me which one is correct?

increasing the rate his heart beats