Answer: Under the given option; the statement (d) is false. i.e. Fluctuations of a stock's returns that are due to firm-specific news are common risks.
Fluctuations of a stock's return that are due to market wide news are common risk. These tend to fluctuate with fluctuation in market wide news and several other variables.
Therefore, the statement Fluctuations of a stock's returns that are due to firm-specific news are common risks, is false.
The correct option to this question is (d)