Hello. You did not show the excerpt to which the question refers, which makes it impossible for that question to be answered accurately.
However, we can affirm that the sentence that you must select is one that shows statistical and / or scientific information, which allows the proof of a certain position or argument in relation to the text's theme. In that case, you should look for that type of information in the text you have.
Answer: Cardiovascular Endurance Training.
I guess it depends. I think it's false, because that seems too long for a sentence.
C. a textbook because they used a primary source to make the textbook and they could have left information out or slightly altered some events.
