I'll give you a question, please answer with step-by-step reasoning process.
Changing the structure of a chromosome can be what to an organsim?\nOptions:\n- (A) massive damage\n- (B) mechanical\n- (C) beneficial\n- (D) harm them\n- (E) negative\n- (F) dangerous\n- (G) homogenous\n- (H) Damages them

(C)
Mutations may change the structure of a chromosome or just change a single nucleotide.

Most mutations are beneficial to the organism.

Changing the structure of a chromosome can be beneficial to the organism.

.

Therefore, the answer is (C)