New TOEFL IBT Pratice Test #007

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Listening | Question 15 of 16

Listen to an Academic Talk

What can be inferred about the crust at mid-ocean ridges?

A) It is much thicker than other parts of the ocean floor.

B) It is geologically very old and stable.

C) It contains a high concentration of soluble minerals.

D) It is completely solid with no cracks.