Use the passage to answer the question.

RNAi has been proposed as a possible way to treat breast cancer and reduce the growth of tumor cells. Which of the following is a possible mechanism for how RNAi could prevent the growth of tumor cells by reducing the concentration of Ets1 in the cells?

The passage does not provide information about the possible mechanism for how RNAi could prevent the growth of tumor cells by reducing the concentration of Ets1 in the cells.