Which of the Following Is Not True About the P/E

Which of the following is not true about the P/E ratio?

A) A comparison of one company with its peers also involves a great deal of subjectivity regarding company-specific characteristics.
B) P/E ratios only work well on companies in the high growth stage of their lifecycle.
C) P/E ratios are uninformative when companies have negative or very small earnings.
D) The volatile nature of earnings implies a great deal of volatility in P/E multiples.