Which of the Following Makes This a True Statement? Ideally

Multiple Choice

Which of the following makes this a true statement? Ideally, when searching for a beta for a new line of business

A) one could find other firms engaged in the proposed new line of business and use their betas as proxies to estimate the project's risk.
B) one would like to find at least three or four pure-play proxies.
C) two (or even one) proxies might represent a suitable sample if their line of business resembles the proposed new project closely enough.
D) All of these choices are correct.