Which Statement About Genetic Variation in Crop Plants and in Their

Which statement about genetic variation in crop plants and in their wild relatives is true?

A) Seed banks have been unsuccessful in storing viable seeds of teosinte.
B) Genetic variation is undesirable and leads to harmful mutations in crop plants.
C) The conservation of wild plant species and their genomes is valuable for genetic variation.
D) The aim of plant breeding programs is to decrease the use of wild species as crops.
E) Genetic variation is only beneficial in fruit crops.