Dr Carol Greider Shared a Nobel Prize for Discovering the Molecule

Dr. Carol Greider shared a Nobel Prize for discovering the molecule telomerase in cells. What does this molecule do in a cell?

A) It helps minimize damage to chromosomes as a cell divides, thus controlling the lifespan of the cell.
B) It causes damage to chromosomes as a cell divides, thus causing the cell to age prematurely.
C) It causes damage to chromosomes as a cell divides, thus triggering cancer.
D) It helps minimize damage copying errors as DNA is duplicated when a cell divides, thus preventing mutations and controlling the lifespan of a cell.
E) It is involved in cell division, controlling the lifespan of a cell, but it's not yet clear how it does this.