The Minimum Age of the LUCA (Last Unique Common Ancestor)is

The minimum age of the LUCA (last unique common ancestor) is the age of the oldest fossils that can be identified with certainty as close relatives of present-day prokaryotes and eukaryotes.Such fossils are about ________.

A) 3.8 billion years old
B) 2 billion years old
C) 542 million years old
D) 3.28 billion years old
E) 65 million years old