In the Equation $R = \frac { \text { dividend } } { P _ { S } } + \frac { \Delta P _ { S } } { P _ { S } } , \frac { \Delta P _ { S } } { P _ { S } }$

In the equation $R = \frac { \text { dividend } } { P _ { S } } + \frac { \Delta P _ { S } } { P _ { S } } , \frac { \Delta P _ { S } } { P _ { S } }$ is the:

A) rate of return to dividends
B) dollar value of the stock market
C) capital return
D) marginal product of stocks
E) discount factor