which could preclude someone from running in a marathon? a serious knee injury a slow running pace

which could preclude someone from running in a marathon? a serious knee injury a slow running pace

which could preclude someone from running in a marathon? a serious knee injury a slow running pace

Answer

Brief Explanations:

A serious knee injury can prevent physical activity like running a marathon due to pain and potential further damage. A slow running - pace does not preclude participation as marathons are open to runners of various speeds.

Answer:

a serious knee injury