What does ICMP (type 11, code 0) denote?

A.
Destination Unreachable

B.
Unknown Type

C.
Source Quench

D.
Time Exceeded

Explanation:
An ICMP Type 11, Code 0 means Time Exceeded [RFC792], Code 0 = Time to Live exceeded in Transit and Code 1 = Fragment Reassembly Time Exceeded.