An ISP needs to provide IP addresses to a network with $1000$ computers. To

accommodate the request the RIR can issue a single class B block of addresses

or multiple Class C blocks. Which solution results in the most efficient use of IP

addresses? Note $$ just look at the numerical use of the addresses, and don$$t

worry about any other factors.

a$)$ Issuing the single Class B block.

b$)$ Issuing $4$ Class C blocks.

c$)$ Issuing a single Class B block and $2$ Class C blocks.

d$)$ Issuing $3$ Class C blocks.