A project manager is reviewing the following tasks: | Task | Duration (days) | Prerequisites | |------|-----------------|---------------| | A | 3 | None | | B | 2 | A | | C | 4 | A | | D | 1 | B, C | Assuming tasks can be performed in parallel if their prerequisites are met, what is the minimum number of days required to complete the entire project?
✓ Correct Answer: Option D
Task A (3 days) must complete first. Then B (2 days) and C (4 days) can run in parallel. C is longer, so it dictates the parallel completion time (4 days). So, after A, C will take 4 days. Total up to C: 3 + 4 = 7 days. Task D (1 day) can only start after both B and C are done (which is after 7 days). So, 7 + 1 = 8 days.