Select the correct answer.
Thomas, a senior manager at a manufacturing firm, is coming up with ideas for a new product. Thomas has made a list of the following tasks that form a part of this project, along with their respective durations.

Create questionnaires to interview potential customers (7 days)
Find existing information about the market from online sources and trade journals (6 days)
Interview the respondents with the help of the questionnaire (10 days)
Design a new product according to the information obtained through the interviews (30 days)
If Thomas conducts a Critical Path Analysis to schedule these activities, what is the most likely duration that the activities will take to be completed?
A.
50 days
B.
40 days
C.
57 days
D.
47 days
E.
67 days