The tightly folded rocks found in many mountain ranges: were formed before the sediments were deposited were formed before the sediments turned to rock were formed after the sediments turned to rock

Answer

The tightly folded rocks found in many mountain ranges were formed after the sediments turned to rocks.

Explanation

On a mountain, the core parts of the mountain range is the most metamorphosed part. The original sedimentary rocks or volcanic rocks experienced intense metamorphic process through folding, or tectonic uplift. Some mountain ranges were formed as a result of multiple thrust of folded sedimentary rocks.