What is Apache's logic if there are several virtualhosts on the same port?

Question

Apache HTTP Server

in the /sites-enable
folder a.conf
b.conf

in a.conf
servername a
in b.conf
servername b

now enter in chrome C (i.e. not a and not b) bound to the same ip or ip itself, but we always get to the one in a.conf
Why?
just because in the sort folder a is ahead of b ? Or is the reason something else?
by what logic do we climb site A if not B but not A either?

Answer 1

the despondency of the lack of answers is striking, but apparently the assumption "banal in alphabetical order" was correct.
changed to 0b.conf and 1a.conf and it became vice versa = always on the B site if not a or b in the address bar.
but whether this is the only reason - due to local despondency, remained unclear.