The Optimal Trade-Off Between Current Leisure and Current Consumption Goods $\frac{w}{1+P}$

The optimal trade-off between current leisure and current consumption goods is expressed as

A) MRS_1,C = $\frac{w}{1+P}$
B) MRS_1,C = w.
C) MRS_1,C = $\frac{w}{(1+R) }$
D) MRS_1,C = $\frac{w}{(1+r) }$
E) MRS_1,C = $\frac{1+r}{(1+R) }$