Question

review the details below. training at the race site can help new runners know what to expect from a marathon - length course. would - be marathon runners must be physically prepared to follow a rigorous training schedule. runners attempting their first marathon should have at least one year of running experience. choose the best topic sentence to introduce a paragraph containing these details. first - time marathon runners must take steps to prepare themselves for the race. even experienced marathon runners must prepare for the physical and mental demands of running a 26.2 mile course. new runners are at a distinct disadvantage if they have never run a marathon race course before.

Explanation:

The provided details all focus on preparation requirements for first-time marathon runners: site training, physical readiness for a strict schedule, and prior running experience. The first option encompasses all these preparation steps for new marathon runners. The second option targets experienced runners, which does not match the details. The third option only addresses a specific disadvantage, not the full scope of preparation in the details.

Answer:

First-time marathon runners must take steps to prepare themselves for the race.