How can this sentence be changed into a compound sentence?

Long strands of ivy curled around the window ledge.
Answer choices for the above question

A. Add a semicolon and main clause it reminded me of a story I once read after ledge

B. Add a comma after the word ivy

C. Add a comma and main clause it reminded me of a story I once read after ledge

D. No change needs to be made to this sentence.