The correct answer is C. Running a marathon.
Slow oxidative muscle fibers are also known as type I muscle fibers. They are slow-twitch fibers that are fatigue-resistant and have a high oxidative capacity. This means that they are able to produce energy aerobically, which is a process that requires oxygen. Slow oxidative muscle fibers are best suited for activities that require endurance, such as running a marathon.
Option A is incorrect because hitting a football requires fast-twitch fibers, which are also known as type II muscle fibers. Fast-twitch fibers are quick-twitch fibers that are not as fatigue-resistant as slow oxidative fibers. They are best suited for activities that require power and speed, such as hitting a football.
Option B is incorrect because heavy workouts in the gym require a mix of both slow oxidative and fast-twitch fibers. The type of fibers that are used depends on the specific exercise that is being performed. For example, exercises that require power and speed, such as weightlifting, will use more fast-twitch fibers. Exercises that require endurance, such as running, will use more slow oxidative fibers.
Option D is incorrect because slow oxidative muscle fibers are best suited for activities that require endurance, such as running a marathon.