the answer for the given question is option c.
The fact that the data may not be based on normal operating conditions complicates cost estimation.
What exactly is cost estimation?
Cost estimation entails making a rough prediction about future costs.
In this question, we must identify the statement that causes problems with cost estimation. The (c) in the given statement makes cost estimation difficult. Because it is necessary to have data based on normal operating conditions in order to estimate costs.
Option (a) is incorrect because it makes cost estimation difficult.
Option (b) is incorrect because it makes cost estimation difficult.
Option (d) is incorrect because it makes cost estimation difficult.
Therefore, the correct answer to this question is option (c)
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