All of the options are relevant to risk response, but the cost of mitigating controls is a key factor in determining risk rankings. Organizations need to consider the cost-effectiveness of different risk responses. If the cost of mitigating a risk is prohibitively high, it may be ranked lower in priority compared to risks with more affordable mitigation options.

While the severity of a vulnerability (B) and the maturity of risk management processes (C) are important, they don't have the same direct impact on ranking as the cost of controls.