To Determine the Weighted Average Returns of Stocks Held in a Portfolio,the

To determine the weighted average returns of stocks held in a portfolio,the weights are determined as the fraction

A) of the total portfolio value of each stock at the midpoint of the holding period.
B) of the total portfolio value of each stock at the end of the holding period.
C) of the total portfolio average value of each stock during the holding period.
D) of the total portfolio invested in each stock at the beginning of the holding period.