What is the most logical next event?

How to prepare your cat for a blood test
Don't feed your cat before the blood test.
Your vet will probably recommend that you not feed your cat for about six hours before the test. This will prevent buildups of fat droplets in the blood that appear after eating.

pick from the following.
[A]. Most doctors advise 12 to 24 hours before the test. For example, if you feed your cat dry milk as the test approaches, it will decrease the amount of carbohydrates your cat has lost.
[B]. These fat droplets can interfere with the test's outcomes. Ensure your cat is not dehydrated.
[C]. Additionally, your vet will likely recommend one of several changes to your cat's diet. Your vet will probably suggest that you feed your cat the different kinds of foods your vet recommends.
[D]. Additionally, after that, your vet may tell you to reintroduce the impurities. Try to not feed your cat blood more than three hours before the test.
[B].