Consider the reaction shown below:

$2$ A $+$ B $$ C

The rate law for this reaction was measured experimentally and found to be:

rate $=$ k $[$A$]2$

Which of the following best describes this reaction?

Group of answer choices

This reaction may be a unimolecular elementary reaction.

This reaction may be a bimolecular elementary reaction.

This reaction may be a termolecular elementary reaction.

This reaction must proceed via a multi$-$step mechanism.