Explain why medium sized co-operation does not want a block of class c addresses?

Medium-sized corporations typically do not want a block of Class C addresses because they often require more IP addresses than a single Class C block can provide. A Class C block offers only 256 IP addresses (with 254 usable), which may be insufficient for their needs as they expand or deploy various services. Additionally, managing multiple Class C networks can complicate network management and increase overhead. Instead, they may prefer larger blocks or a more efficient allocation of IP addresses through techniques like subnetting or using private IP addresses with NAT.