Some parts of the sentence have been jumbled up. You are required to rearrange these parts which are labelled P,Q,R and S to produce the correct sentence . Choose the proper sequence and mark in accordingly. when steam engines/(P) dominated industrialization /(Q) coal was the main source/(R) of energy in the initial stages,/(S)

Options

A. SPRQ
B. RSPQ
C. PQRS
D. QRSP