Answer:
A. the point of mild discomfort
Step-by-step explanation:
In general there are two types of stretching activities, dynamic and static. Static stretching is usually done at the end of a workout regime. The stretches are hold constant for a period of time thus the name "static". As a result, the muscles cool down and loosen up. In long term this activity also increases flexibility.
A static stretch is hold usually for 10-30 seconds up to the point of slight discomfort. It should not result in sharp pain as it could be a sign of muscle damage. By stretching just up to the point of mild discomfort, the range of muscle motion can be increased slowly over the time.