An inherited TP53 mutation is known as Li-Fraumeni syndrome. What is the role of the TP53 gene in the body?

This gene makes a protein (pRB) that helps stop cells from growing too quickly.

It is the 'Guardian of the genome' for regulating DNA repair and cell division preventing the development of tumors.

It regulates cellular metabolism and proliferation as a "master regulator."

None of these.