________ capabilities allow marketers to potentially locate customers when they are geographically proximate to a retail outlet

When may a real estate broker, serving as agent of the seller, refuse to transmit an offer to the principal?

A. When the owner has already accepted a "back up" offer B. When the broker is acting as a gratuitous agent C. Never D. When the broker is acting on the express instructions of the principal in his refusal

The default _________ policy increases ease of use for end users but provides reduced security because the security administrator must, in essence, react to each new security threat as it becomes known.

What will be an ideal response?