You need to design a VPC for a web-application consisting of an Elastic Load Balancer (ELB). a fleet of web/
application servers, and an RDS database. The entire Infrastructure must be distributed over 2 availability
zones.
Which VPC configuration works while assuring the database is not available from the Internet?

A.
One public subnet for ELB one public subnet for the web-servers, and one private subnet for the database

B.
One public subnet for ELB two private subnets for the web-servers, two private subnets for RDS

C.
Two public subnets for ELB two private subnets for the web-servers and two private subnets for RDS

D.
Two public subnets for ELB two public subnets for the web-servers, and two public subnets for RDS