A. There is also an order composed of different types of seals.
The information states that there is an Otariidae family of seals with ears that includes seven genera. This implies that within the order of seals, there are different families, including the Otariidae family, and within that family, there are several genera. The information does not provide any direct evidence or indication of the presence of a family of seals without ears (option B), seven genera of seals without ears (option C), or that the species in each genus have different types of ears (option D).