Cytoskeletal elements play important roles in cell division. The mitotic spindle apparatus is made of and pulls sister chromatids apart, and the contractile ring which forms the cleavage furrow is composed of and is required for the separation of daughter cells at the end of animal cell cytokinesis.

the answer is c

explanation:

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.