delivery of m-commerce transactions to individuals in a specific location, at a specific time

The correct answer is A. location-based m-commerce (l-commerce).

Location-based m-commerce (l-commerce) is a type of mobile commerce that enables businesses to deliver targeted content and services to consumers based on their location. This can be done through a variety of technologies, such as GPS, RFID, and Wi-Fi.

l-commerce can be used for a variety of purposes, such as:

• Providing coupons and discounts to consumers who are near a business.
• Sending targeted advertising to consumers based on their interests.
• Providing directions and other location-based information to consumers.
• Tracking the movement of goods and people.

l-commerce is a growing trend, as more and more people are using mobile devices to access the internet and make purchases. According to a study by eMarketer, global l-commerce sales are expected to reach \$461 billion by 2020.

Here are brief descriptions of the other options:

• Context-aware computing is a type of computing that takes into account the context in which a user is operating, such as their location, time of day, and current activity. This information can be used to provide users with more relevant and personalized content and services.
• Ubiquitous computing (ubicom) is a vision of a future where computing is embedded in the environment and is available to users anywhere and anytime. This would allow users to interact with computers in a more natural and seamless way.
• Network-based positioning is a method of determining the location of a device by using information from a network of wireless transmitters. This can be used to provide location-based services to users, such as maps and directions.