pick from the following.
[I] parasites
[II] cancer
[III] respiration
[IV] digestion
[V] pesticide
[VI] radiation
[VII] ovaries
[VIII] weathering
Given those answer options, answer the question: Fact 1: Cells that divide uncontrollably may form a tumor, or abnormal mass of cells. Fact 2: Cancer begins when a cell begins dividing uncontrollably. Given the two facts above, what can cause a tumor to form?
A:
[II]