Regularly spaced joints in an outcrop may indicate that an area is under intense shear stress. Hence, Option C is correct.
<h3>What is Shear Stress?</h3>A kind of stress that arises from a component. The components of force and material cross section are in parallel directions. A stress that changes a member's shape. This stress is great when it is parallel to neutral axis. Shear stress is denoted by τ. In Greek it is pronounced as "tau".
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Therefore, Option C: under intense shear stress is correct.
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