How does the $1980$ United Nations Convention on Contracts for the International Sale of Goods $($CISG$)$ differ from the Uniform Commercial Code $($UCC$)?$ Choose $3$ answers.

The CISG does not apply to consumer sales.

The CISG is stricter on requiring mirror image acceptances.

Under the CISG, all sales contracts of $$500$ or more must be in writing.

Under the UCC, an irrevocable offer must be in writing, but under the CISG it can be oral.