A. A snippet is any graphical element used on more than one asset.

B. A snippet is a grouping of texts and graphical elements that can be associated to a segment.

C. A snippet is re-useable content for implementing dynamic content

D. Snippets are assigned to single editable regions within an email.

I'm thinking it's A since "any graphical element" probably covers images, but anyone familiar with snippets that can confirm?