One smallish correction, using a reduced thrust would not help in the case as Vmcg is based on rated thrust. A derate thrust setting would work, however.
Yes sorry GF, I was being a bit sloppy with the terminology there. Curiously the distinction between reduced/flex thrust and derates has never been emphasised in the JAR syllabus, so the examiners would not have been looking for option d in the original question.