You can create an empty element in an XML document by adding a ____ before the tag's closing bracket to close the element.

A ________ can be the aggregate of 2013 Profit or a monthly sales goal that every employee should meet

A) target value B) status threshold C) KPI D) base value

ensures that messages, consisting of pieces called “packets”, are properly routed from sender to receiver and that those messages arrive intact.

a) HTTP b) TCP c) IP d) HTML