Calvin agrees to pay Abby $ $100$ ?a month to be his gardener and draws up a contract to that effect. Calvin also promises verbally that if she does a good job for $18$ ?months, he will pay a bonus of $ $1000.$ ?After a year, Calvin agrees that Abby did a good job, but he refuses to pay the bonus. Which of the following are true $($ select all that apply $)?$

Abby can sue for breach of contract.

Abby can collect damages.

The bonus is unenforceable because it was not written down and thus outside the statute of frauds.

The verbal agreement is parol evidence that is not admissible as part of the gardener agreement.