Which of the following is an example of an embedded computer?

A) adaptive cruise control system
B) Apple II
C) smartphone
D) RFID tags

An adaptive cruise control system is a good example of an embedded computer because it is a computer system that is built into a vehicle to control the speed and distance of the vehicle from the car in front of it. The control system operates without the need for human intervention, and it relies on sensors and other embedded devices to provide real-time feedback and control. The other options, such as the Apple II, smartphone, and RFID tags, are not necessarily embedded computers, as they are generally more standalone systems that do not have the same level of integration and embedded technology as an adaptive cruise control system.