Hello!
I hope this is the right answer!
The talk test is used for monitoring exercise intensity. The talk test means that if you can talk and sing while exercising without running out of breath, you're exercising at a low intensity. You don't need any equipment to do the talk test. A benefit of the talk test is that it is easy to perform. It is also reliable, practical, and inexpensive tool for monitoring exercise intensity.
SO your answer is its easy to preform so A!