Question

select the text from the paragraph that best helps you understand that grueling means difficult. there may be more than one correct choice. football players and coaches spend many long hours working to be the best. teams are now using new tools to help with this grueling task. in the old days, coaches just told players to lift weights and run. now, coaches use technology to help their players train. machines help coaches see the players speeds and how much weight theyre lifting. machines even track how many hours the players are sleeping. this kind of information can help coaches keep players healthy.

Explanation:

The phrase "spend many long hours working" shows that the task (to be the best) is time - consuming and arduous, which implies difficulty. This context clues the meaning of "grueling" as difficult.

Answer:

spend many long hours working