Answer:
c. Purchase a wireless expansion card and install it in your system.
d. Purchase a USB wireless adapter and connect it to the computer by way of a USB port.
Step-by-step explanation:
Assuming you purchased a new desktop computer that does not have wireless capability, and then you decide that you want to use a wireless connection to the Internet.
The least expensive ways to upgrade your system to wireless is to;
1. Purchase a wireless expansion card and install it in your system. The expansion card is a slot on the motherboard of a computer which allow users use an additional feature such as network, video, sound that may not be available before.
2. Purchase a USB wireless adapter and connect it to the computer by way of a USB port.