You are required to "fast-track" your project schedule. THerefore you should be prepare to:

a) Eliminate some items of scope, with approporate stakeholder approval

b) Increase resources if they become over-allocated

c) Communicate a time extentsion

d) Shorten the duration fo critical path activities

Source of question: Ferndale's pmp

Given answer is b. I understan first part "increase resource" but don't understand second part "if they become over-allocated"

Won't "d" be possible answer?