Fiber Optic is the most resistant to tapping because Fiber Optic uses a light to transmit the signal. While there are some technologies that will allow to monitor the line passively, it is very difficult to tap into without detection sot this technology would be the MOST resistent to tapping.
The following answers are in correct:
microwave. Is incorrect because microwave transmissions can be intercepted if in the path of the
broadcast without detection.
twisted pair. Is incorrect because it is easy to tap into a twisted pair line.
coaxial cable. Is incorrect because it is easy to tap into a coaxial cable line.

Packet Filtering Firewall - only examines an IP packet based on Source IP (SIP),
Destination IP (DIP), Source Port and Destination Port for both UDP and TCP by subjecting each
IP packet to an Access Control List.

The correct answer is confidentiality, because the data can now
be read by someone outside of a monitored environment; availability,
because the user has lost the computing ability provided by the unit;
and integrity, because the data residing on and any telecommunications
from the portable are now suspect.