Item WE056001: The solid rock of mountains was being worn down by wind and water millions of years ago, and it is being worn down by wind and water today.

Which of the following is TRUE about the wearing away of the solid rock of mountains by wind and water over time?

  1. The solid rock of mountains was being worn down by wind and water millions of years ago, and is being worn down today.
  2. The solid rock of mountains was being worn down by wind and water millions of years ago, but is no longer being worn down today.
  3. The solid rock of mountains is currently being worn down by wind and water, but was not being worn down millions of years ago.
  4. The solid rock of mountains was not being worn down by wind and water millions of years ago, and is not being worn down today.