The correct answer is C. hybrid.
A hybrid cloud is a combination of public and private clouds. The infrastructure is owned by both the vendor and the customer. The customer has control over the infrastructure in the private cloud, while the vendor has control over the infrastructure in the public cloud.
A public cloud is a cloud computing environment that is open to the public. The infrastructure is owned and operated by a cloud service provider. The customer does not have control over the infrastructure.
A private cloud is a cloud computing environment that is dedicated to a single organization. The infrastructure is owned and operated by the organization. The organization has control over the infrastructure.
None of the mentioned is not a valid answer.