The correct answer is option A. The connotative effect of the word lifesavers suggests that the author has a positive opinion of the pills and believe they can help protect athletes' lives. The reason behind this is that the author refers to the pills as "tiny lifesavers" which have effective. The quality of being "lifesaver" refers to something that helps people in a very important way. This is why the author is said to have a positive opinion of the pills.