Corriendo por el parque me lastimé a. el calambre b. la rodilla

La rodilla (the knee)

B. La rodilla (knee).
A. El calambre, meaning "the cramp" doesn't fit in with the sentence, therefore discarding this answer choice.
Hope this helps!:)

Ican you but what's the list of items?

It would be answer b because volver a mi cada would be go back to my house