According to the Maximum Availability Architecture, which case is best?

According to the Maximum Availability Architecture, which case is best?

A.
Run two identical sites with a primary RAC database on the first site, and only a RAC logical standby database on the second site.

B.
Run two identical sites with a primary RAC database on the first site, and only a RAC physical standby database on the second site.

C.
Run two identical sites with a primary RAC database on the first site, and RAC physical and logical standby databases on the second site.

D.
Run two identical sites with a primary RAC database on the first site, and non-RAC physical and logical standby databases on the second site.