This symbiotic relationship provides support for the theory of endosymbiosis, which states that

The correct answer is B

B) Mitochondria and chloroplasts evolved from small prokaryotes living within larger cells.

The Endo-symbiosis theory states that some organelles like mitochondria & chloroplast were small living prokaryotes, which ultimately, aided in the development of complex cells like eukaryotes.

answer; the above answer to the above statement is (true)