Total number of stereoisomers shown by the complex $$[\text{W(CO)}_4\{\text{P(OR)}_3\}\text{SR}']$$ where $$\text{R} = -\text{C}_6\text{H}_5$$ and $$\text{R}' = -\text{CH}_3$$

A

Two

B

One

C

Three

D

Four