Notice the Part of This Image Labeled "Continued Trench Rollback

question 33

Multiple Choice

Notice the part of this image labeled "continued trench rollback." What is happening in "trench rollback"?

• A)Old, dense lithosphere sinks, creating slab suction that pulls the upper plate toward the trench.
• B)Continued tension on the plate results in rifting, dropping blocks of continental crust.
• C)The trench gets deeper as the descending plate locks against the overriding plate and pulls it down.
• D)Rising magma plutons melt the base of the lithosphere to create a depression.

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