Why Are Marketing Costs High in the Introductory Stage of the Product

Why are marketing costs high in the introductory stage of the product life cycle?

A) Cutthroat competition during the introductory stage can lead to price wars.
B) Sales increase rapidly during the introductory stage,requiring greater investment for marketing.
C) High dealer margins are often needed to obtain adequate distribution.
D) Product and manufacturing costs need to be identified and corrected.