Vervet monkeys use a set of different sounds to alert group members that a predator is nearby. Is this form of communication considered language?

No$,$ it is not a language because there is no written form for these sounds.

No$,$ it is considered a call system because the call$/"$word$"$ produces a specific targeted behavior and can't be combined with other calls or modified to produce new meanings.

Yes, it is language because it can transmit an unlimited amount of information.

Yes, it is language because each call is like a "word" that carries meaning.

No$,$ it is considered a call system because only some vervet monkeys