Please answer with detailed and good reasons as why the chosen option is right and why other options are wrong also make sure the answer is 100% correct, else leave it for the other tutor to answer. Otherwise i will downvote the answer and report it for unprofessionalism for sure. Please don't use AI or Chat GPT also make sure there is no plagiari.sm. QUESTION:

When making scrap or rework decisions, management should consider: (Check all that apply.)

1. costs already incurred in producing defective units.

2. existing sales.

3. revenue from selling defective units as scrap.

4. incremental costs.