A(n) __ heading acts as a subtitle by grouping it with a main title heading using the hgroup element.

To mention another user in a post, enter the ________ character, followed by the person's name

A) @ B) # C) + D) ~

When viewing a document in Outline view, when the heading marker is a ________ it indicates that either other outline levels or more body text is associated with the level

A) question mark B) minus sign C) dollar sign D) plus sign