Final answer:
TLDs have different purposes based on their type, and PTI manages root DNS and coordinates the assignment of TLDs.
Step-by-step explanation:
TLDs, or Top-Level Domains, serve different purposes depending on their type. Some common generic TLDs and their purposes are:
- .com: typically used for commercial websites
- .org: typically used for non-profit organizations
- .edu: typically used by educational institutions
PTI, or Public Technical Identifiers, is responsible for managing the root DNS infrastructure and coordinating the assignment of TLDs.
Therefore, the correct answer is: TLDs signify content type, PTI manages root DNS (Option c).