Answer: Option C
Step-by-step explanation:
The effect of the increased blood flow in the body at the time of exercising is that the body gets delivered with more oxygen.
The blood flows to the various parts of the body carrying oxygen. This enables more ATP production.
If there would not be enough oxygen supply then in the absence of the oxygen lactic acid deposition in the muscles will take place that causes pain.
Hence, the correct answer is option C