Imagine you have a critical path A-B-C-D of 20 days duration.

You have other path like A-B-E of 16 days duration.

Now the questions tells you that activity E increases in 3 days.

What's the situation now?.

Possible answers:

a) Nothing

b) Risk increases

Sumarized, answer B is correct.

I realize that A-B-E has become a near-critical-path (19 days). But is it enough to consider that the risk of the project has increased ??