Final answer:
To determine the probability of completing a project within 185 work days, we need additional information such as the mean and standard deviation of the completion time. Without this information, we cannot determine the probability accurately.
Step-by-step explanation:
To calculate the probability that a project will be completed within 185 work days, we need more information. We require the mean and standard deviation of the project completion time. Once we have these values, we can use the z-score formula to find the probability. However, without these values, we cannot accurately determine the probability. Therefore, none of the given answer choices (A. 0.25, B. 0.50, C. 0.75, D. 0.90) can be confirmed as the correct answer.