Answer: c) Accredited domain name registrars
Step-by-step explanation:
Internet Corporation for Assigned Names and Numbers (ICANN) is the organization that has non-profit system which helps in operations like assignment of protocol parameter, management of DNS(domain name system), locating space for IP(Internet Protocol) address etc.
It has the responsibility of managing the numerical and namespace of the internet through the help of companies that are known as accredited domain name register to work as registrar for one or more collective stages.
Other options are incorrect because network center for information provides network information. Independent domain name registers cannot manage numerous level of domain.Registry operators manage the the registration process of domain.
Thus, the correct option is option(c).