This is no class war, but a war in which the whole British Empire and Commonwealth of Nations is engaged. Which sentence has the same usage of engage?

A、Eveninprison,hecontinuedtoengageincriminalactivities.
B、Shetrieddesperatelytoengagehiminconversation.
C、Shehastheabilitytoengagewithyoungminds.
D、Heiscurrentlyengagedasaconsultant.