Which of the following reasons would NOT explain the difficulty of determining appropriate executive compensation?

a.The decisions made by top-level managers are typically complex and nonroutine.
b. An executive's decisions often affect firm performance only over the long run.
c. A number of factors intervene between top-level management decisions and firm performance (e.g., unpredictable economic, social, or legal changes).
d. The compensation committee may not have comprehensive firm performance data.