How is Earth's crust recycled? A. Earth's crust is not recycled, only created.
B. As molten rock seeps out of weak spots in the crust, volcanoes are formed.
C. When plates slide past each other, creating friction, an earthquake forms.
D. As new crust is created, old crust is forced down deep inside Earth's mantle, where it becomes molten rock again.

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous