Fact 1: Cancer cells divide more often than normal cells, and grow out of control.

Fact 2: Cells that are homeless are called cancer cells.

Given the two facts above, answer the question "homeless cells grow how?" with the following options: 
- to be non-cancerous
 - by indirect light
 - reducing acid rain
 - out of control
 - colder and wetter
 - layers of fat
 - slowly
 - in control


 

    out of control     