Question

form a compound sentence.
desmond sprained _______________ in the tennis tournament.
his ankle, so he cant play
his left ankle, not his right,
or twisted his left ankle

Explanation:

A compound sentence combines two independent clauses (or a clause and a phrase with a logical connection) using a coordinating conjunction or a semicolon. The first option "his ankle, so he can't play" creates a compound sentence where "Desmond sprained his ankle" is one clause, and "he can't play in the tennis tournament" (implied) is the second, connected by "so" to show cause - effect. The second option is just a phrase adding detail, not forming a compound sentence. The third option has an incorrect structure with "or" as "sprained" and "twisted" would need a better conjunction or structure for a compound sentence.

Answer:

A. his ankle, so he can't play