Geologists think earth’s continents began to form

a.
at the same time that earth formed
b.
at about the midpoint of precambrian time
c.
about 500 million years after earth formed
d.
near the end of precambrian time

Hi the answer is A hope this could help

Explanation:

Geologists think the earth's continents began to form about the same time the earth was formed. Most of the rocks on the continental crust are about the oldest that been used to date the age of our planet.