There are indeed two answers above that are valid for including
elements, such as images,
within your HTML document. The fastest method is to simply reference a
remote image by
specifying any valid URL for the SRC attribute of the tag. However,
images and other
component content can also be embedded within the MIME e-mail itself
as a MIME content
block. These content blocks are then assigned a content ID, which can
be referenced from
the SRC attribute using the cid: resource identifier followed by the
assigned content ID. This
means that Answers B and C are correct.