Which statement about cancer is true? a)cancer starts when cells stop growing and dividing. b)growth factors control when and how fast cells die. c)mutations in certain genes cause tumors.

C. mutations in certain genes cause tumors

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.