Review the description below of a database named DB$1,$ then select the database type most closely fits DB$1\text{'}$s description.

DB$1$ is populated once every $24$ hours from data in databases from three grocery stores. DB$1$ is used exclusively to make management decisions by looking at trends of the data over time, such as the number of specific products purchased over a period of time, and which stores are selling certain products well.

a$.$

DB$1$ is a distributed database.

b$.$

DB$1$ is an online$-$transaction processing $($OLTP$)$ database.

c$.$

DB$1$ is an online$-$analytical processing $($OLAP$)$ database.

d$.$

DB$1$ is a parallel database.