Which of the following relates to the formation of the Himalayas?

Which of the following relates to the formation of the Himalayas? 

(A) Folding of the earth's crust 

(B) Accumulation of loess deposits 

(C) Folding of the geosyncline 

(D) Faulting of the earth's crust 

Answer: (C) Folding of the geosyncline