The correct answer to the quiz question "Rocks in continental crust are as old as years." is:
A. 4.4 billion
The oldest rocks found on Earth, which are part of the continental crust, have been dated to about 4.4 billion years old. These ancient rocks provide important information about the early history of the Earth's formation and development. Rocks that are 44 million or 200 million years old are relatively much younger compared to the oldest known rocks on the continental crust. Therefore, option A is the correct answer.
