When Stacy tries to delete the field Image,” in the Design view image below, she

When Stacy tries to delete the field "Image,” in the Design view image below, she receives no warning message and the field deletes. But when she attempts to delete "BotanicalOrigin,” a warning message appears. Which best explains this difference? a. “Image” is a primary key, and “BotanicalOrigin” is not a unique identifier.
b. “Image” is not a unique identifier, but “BotanicalOrigin” is a primary key.
c. “Image” contains no data, but “BotanicalOrigin” does contain data.
d. “Image” contains data, but “BotanicalOrigin” does not contain data.