Question

how has the study of mitosis affected scientists knowledge of cancer?
it led to a study of how to induce cancer cells to divide more rapidly.
it led to an understanding of how cancer cells divide so rapidly.
it led to the development of contact - inhibition regulators.
it led to the discovery of how to prevent cancer cells from dividing.

Explanation:

Mitosis is the process of cell - division. Cancer cells divide rapidly. Studying mitosis helps scientists understand the abnormal cell - division process in cancer cells. Inducing cancer cells to divide more rapidly is not a goal. Development of contact - inhibition regulators and discovery of how to prevent cancer cells from dividing are not direct results of studying mitosis itself. Understanding the rapid division mechanism of cancer cells is a key outcome of mitosis study.

Answer:

It led to an understanding of how cancer cells divide so rapidly.