B
Explanation:
Class B addresses start with a binary of 10. The valid class B range is 128.0.0.0-
191.255.255.255.
Incorrect Answers:


A. Class A addresses start with 0, as they are addresses that are less than 128.


C. Class C addresses start with 110, for a value of 192.0.0.0-223.255.255.255


D. Class D addresses start with 1110. They are reserved for multicast use


E. Class E addresses start with 11110. They are currently reserved for experimental use.   _{Your Comment}