Final answer:
Presence awareness is the ability of business-grade IM systems to quickly see which people are at their desks and available to IM. Hence the correct answer is option D
Step-by-step explanation:
The ability of business-grade IM systems to quickly see which people are at their desks and available to IM is referred to as presence awareness. Presence awareness is a feature of instant messaging systems that allows users to see whether the people they want to communicate with are online and available to chat. This feature is commonly used in business settings to facilitate quick and efficient communication.
Hence the correct answer is option D