15. The author of Passage B uses the phrase “whittle away” (line 80) to refer to the way that apple varieties have been:
A. gradually lost from nursery catalogs, farmers’ markets, and the American table.
B. modified by plant breeders, entomologists, and pathologists to meet specialized needs.
C. weeded out by scientists until only the few thousand most resilient varieties remained.
D. pared down in 1904 to the few varieties that nursery catalogs wanted to feature.