Call them back and ask the SA to explain it in detail. They have to disclose to you what will be performed on your car. Then compare & contrast., and you'll realize one is likely double-charging you! After all, there's a reason on why they're called stealerships!
BTW, I think D is like an oil change and basic inspection (like the old A service). Alot of these things can be DIY and you'll save lots of $$.
