What is the name for this type of application?

Customers use your company’s software to receive real-time weather reports. One of the company’s software developers has proposed creating a second application that installs at the same time as the weather software, but operates in the background and reports user preferences and other information to your company. What is the name for this type of application?

A.
Value-add

B.
Freeware

C.
Spyware

D.
Daemon