Given the attached chart, which of the following is the critical path if one day is added to each task for quality control?

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During a project, the project manager discovers there is insufficient time allotted for quality control.

The project manager prepared to submit a revised schedule to the CCB.

Given the attached chart, which of the following is the critical path if one day is added to each task for quality control?
A . 12 days
B . 16 days
C . 17 days
D . 22 days

Answer: D