Mitosis should be error free; however, if errors do occur healthy cells can become___
cells.

Explanation:

When a cell divides, it creates two identical daughter cells that each carry a copy of the original cell's DNA. The name for this process is mitosis, and errors in the process result in incorrect DNA copies. The effects of these errors on the health of the organism range from benign to deadly, depending on their number errors and type. One potential consequence is cancer;

it's unlikely a majority of a large population would agree on issues

hope this : )

b. lithosphere, asthenosphere, mesosphere   is the answer most likely