Because Web servers axe platform and appli

问题：

Because Web servers axe platform and application (71) , they can send or request data from legacy or external applications including databases. All replies, once converted into (72) . mark-up language, can then be transmitted to a (73) .Used in this way, Intranets can (74) lower desktop support costs, easy links with legacy applications and databases and, (75) all, ease of use.

（74）处填（）。

A．off

B．offer

C．office

D．officer