Hi, help a sis out please :( thank you!!

Yeah, D is the right anwser!

Step-by-step explanation:

I would be here for way to long to type up the explanation. And I don't have time to waste.

Depends on what the numbers that you are using in order to get the answer. Meaning that this isn't  enough information to answer the question. You should probably add more to help everyone else to help you out. But I can see what i can do with the information that we have here. 

First off the expanded form of 840.02 would have to be 800 plus 40 plus 0 but then you get to the decimal places which you would then add 0.02 and that would come out to the answer to your question.

hope this helps