Why is Lewis Structure A Better for Diazomethane?

[Puchinita5]

Homework Statement

I was taking a practice exam, and it asked for the "acceptable lewis structure for Diazomethane"

I had narrowed it down to two possible results but can't for the life of me figure out why one is more acceptable than the other. I attached a picture of the two choices.

I know the answer is A, the first choice. But I don't know why!

Homework Equations

The Attempt at a Solution

 

[Puchinita5]

anyone? :-/

 

[sjb-2812]

I think it's as simple as the form with the neutral carbon reflecting better the reactivity of the compound, as in e.g formation of the methyl ester with acids. Otherwise you may get repulsion of two negative charges which is unfavourable.