On an OS/JCL statement, one or more __________ separate the name field from the operation field, which must be JOB, EXEC, or DD.

Using the ________ feature to broadcast your current location can alert any potential stalkers where to find you or tell potential burglars that your house is currently empty

Fill in the blank(s) with correct word

Real-time messaging systems, such as IM, are primarily ____ communications, which means that everyone who is communicating must be online at the same time.

A. synchronous B. asynchronous C. routed D. presence