A company is developing an internal application that uses a PostgreSQL database. The company decides to host the database on Amazon Aurora. The application does not need to be highly available, but data must be stored in multiple Availability Zones.
Which database configuration meets these requirements MOST cost-effectively?
A. An Aurora PostgreSQL global database cluster
B. An Aurora PostgreSQL DB cluster that has a single DB instance
C. An Aurora PostgreSQL DB cluster that has a primary DB instance and a read replica
D. Two Aurora PostgreSQL DB clusters, with each DB cluster in a separate Availability Zone