Based on Craig Benkman's Work on Coevolutionary Interactions Between Crossbills

Based on Craig Benkman's work on coevolutionary interactions between crossbills and pine trees, which of the following would be expected?

A) A population where pines are not well-defended against crossbills likely has more squirrels than crossbills.
B) A population where pines are not well-defended against crossbills likely does not face a trade-off in defense against different predators.
C) A population where pines are not well-defended against crossbills likely has more crossbills than squirrels.
D) none of the above