Answer: Option c
Explanation: In simple words, the capital asset pricing model (CAPM) is a model used to determine an asset's hypothetically suitable necessary return rate to decide to attach assets to a diversified portfolio.
The equation takes into consideration the exposure of the asset to non-verifiable uncertainty , also expressed by the quantity beta (β) in the financial industry, as well as the expected market return and the expected return of a risk-free hypothetical asset.
Hence from the above we can conclude that the correct option is .