Select the two layers of ORA application infrastructure from the following list:

Select the two layers of ORA application infrastructure from the following list:

A.
Application

B.
Platform

C.
Abstraction

D.
Computing Foundation

Explanation:
The ORA Application infrastructure covers the following layers:
*Platform
* *Virtualization
**Containers:
* Computing Foundation
** Distributed Computing:
**Grid Computing
** Caching

Reference: Oracle Reference Architecture, Application Infrastructure Foundation, Release 3.0