What is a correct sequence of OS versions to upgrade this to DD OS 5.7?

A DD860 Extended Retention enabled system is running DD OS 5.2.

What is a correct sequence of OS versions to upgrade this to DD OS 5.7?
A . 5.2 > 5.6 > 5.7
B . 5.2 > 5.5 > 5.7
C . 5.2 > 5.4 > 5.7
D . 5.2 > 5.3 > 5.7

View Answer

Answer: B