Why do Fold Mountains have enormous thickness of sedimentary rocks?

A. Due to deposition of sediments in a valley for millions of years

B. Due to accumulation of sediments in a geosyncline

C. The plains were folded into mountains

D. The sediments were folded into recumbent and nappe folds

Answer: Option B

Solution(By Examveda Team)

Due to accumulation of sediments in a geosyncline fold mountains have enormous thickness of sedimentary rocks. The plains were folded into mountains and The sediments were folded into recumbent and nappe.