In Monster Manual p. 295-298, it talks about PCs becoming Vampires. The Vampire stat block says:
Multiattack. The vampire makes two attacks, only one of which can be a bite attack.
(The Vampire Spawn has the same Multiattack action.)
Because of the word "can", would it be possible to assume that it also could choose not to? Specifically, for the multiattack, could the Vampire just use their claws twice instead of one claw and one bite?
It looks like they can't bite twice because "only one" can be a bite, but it doesn't comment on the claws.