The Yucca and the Yucca Moth Have an Exclusive Plant‒pollinator

Multiple Choice

The yucca and the yucca moth have an exclusive plant‒pollinator relationship.Which would represent a cost, rather than a benefit, of this relationship?

A) The moth always delivers pollen to the correct plant species.
B) The moth eggs are laid near their food source.
C) The moth has no competitors for the yucca's pollen.
D) The yucca will always have a pollinator.
E) Neither species can survive without the other.