PMI Exam PMI-SP Topic 7 Question 55 Discussion

Mary is the project manager of the H1QZ Project. This project is a subproject of the HQZ Project and the project schedule is fixed and cannot vary. Stephen, a project team member, reports that he's having trouble completing his project assignment and will likely be at least two days late. Examine the figure given below:

If Stephen's assignment is Activity B, what impact will his two days of lateness have on the project end date?