Consider the Following Passage

Multiple Choice

Consider the following passage:
Julia sells exotic birds. She has placed four orders with wholesale bird supplier Papagayo Co., and all of them have been filled with healthy birds. Lately, however, some wholesale competitors have been trying to get her to order from them. But, when it's time to make the next order, she decides she's better off with Papagayo because she's pretty sure she'll get healthy birds. (Do not assume that you know anything about birds or the bird business.)
If we don't know what kind of bird she's about to order, we have the strongest argument if the previous orders were

A) some for parrots and some for macaws.
B) just for parrots.
C) just for macaws.