What Is the Difference Between a Pen Register and a Trap-And-Trace

What is the difference between a pen register and a trap-and-trace device?

A) A pen register records incoming addressing information (such as caller ID information) ; whereas a trap-and-trace device records outgoing addressing information (such as numbers dialed from a phone) .
B) A pen register records outgoing addressing information (such as numbers dialed from a phone) ; whereas a trap-and-trace device records incoming addressing information (such as caller ID information) .
C) A pen register intercepts communication; whereas a trap-and-trace device does not intercept communication.
D) A pen register does not intercept communication; whereas a trap-and-trace device intercepts communication.