Review the description below of a database named DB$10,$ then select the database type that most closely fits DB$10\text{'}$s description.

DB$10$ is used by the human resources department in an organization to record the details of the organization's employees. When an employee is hired, the employee's details are entered into DB$10.$ If the employee is fired, that fact is noted in DB$10.$ If the employee changes his$/$her address, the change is noted in DB$10.$

a$.$

DB$10$ is a distributed database.

b$.$

DB$10$ is an online$-$transaction processing $($OLTP$)$ database.

c$.$

DB$10$ is an online$-$analytical processing $($OLAP$)$ database.

d$.$

DB$10$ is a parallel database.