Compared to the Age of Earth Accepted as Correct Today

Compared to the age of Earth accepted as correct today, how did 17th and 18th century proponents of catastrophism envision the Earth's age?

A) They believed Earth to be much older than it really is.
B) They were right on the money, give or take a few million years.
C) They believed Earth to be a few hundred years younger than it really is.
D) They accepted Bishop Ussher's calculation but explained the differences in landforms and geology by violent catastrophes.