Mary is the project manager of PKT project. In Mary's project there are certain enterprise environmental factors that require Mary to use modeling and simulation techniques to predict the likelihood of achieving cost and schedule objectives in the project. Mary is using a technique for which the cost estimates are chosen at random for each iteration of the analysis, such as pessimistic, most likely, and worst-case scenarios. What type of analysis is Mary using in this project?
选项：

A: Quantitative analysis
B: Qualitative analysis
C: Risk distribution
D: Monte Carlo Analysis