
Answer:
A. They are have a limitless growth potential, in part due to their ability to maintain telomere length, and in culture will continue to divide indefinitely.
Explanation:
Unlike normal cells, telomeres shorten in every cell division until eventually they become too short to protect the chromosomes and the cell dies. Cancer cells reverse the telomeres shortening, and instead, they  lengthen  them, thus they become inmortal.