being a first mover is NOT particularly advantageous under which circumstances? a. when moving first with a preemptive strike makes imitation difficulty or unlikely b. when first time buyers remain strongly loyal to pioneering firms in making repeat purchases c. when early commitments to new technologies , types of components, or emerging distribution channels produce an absolute cool advantage over rivals. d.when markets are slow to accept the innovative product offering of a first mover, and fast followers possess sufficient resources and marketing muscle to overtake a first mover