Right option is (a) <marquee>
Easy explanation: <menu> element in HTML represents group of commands that user can perform or activate. <menuitem> represents a command which helps user to pop up through menu. <marquee> element is used to insert scrolling area of text. You can control what happens when text reaches edges of its content area using its attributes. It includes the attributes behavior, bgcolor, height, hspace, loop etc. <multicol> is an experimental element designed to draw multi-colour layouts.