单选题A customer needs to achieve a very aggressive RTO of 30 minutes or less. A critical requirement is a continuous availability and disaster recovery solution for the mainframe environment. What IBM solution should be recommended to this customer?（）A Metr
题目
单选题
A customer needs to achieve a very aggressive RTO of 30 minutes or less. A critical requirement is a continuous availability and disaster recovery solution for the mainframe environment. What IBM solution should be recommended to this customer?（）
A
Metro Mirror
B
Metro/Global Mirror
C
Geographically Dispersed Open Servers (GDOS)
D
Geographically Dispersed ParallelSysplex (GDPS)