问题如下：
Which of the following statements regarding distributions made by ETFs is correct?
选项：
A. Return-of-capital (ROC) distributions are generally not taxable.
B. ETFs generally reinvest any dividends received back into the ETF’s holdings.
C. A dividend distribution is a distribution paid to investors in excess of an ETF’s earnings.
解释：
A is correct. Return-of-capital distributions are amounts paid out in excess of an ETF’s earnings and serve to reduce an investor’s cost basis by the amount of the distribution. These distributions are generally not taxable.
