What are the current hours of live coverage available on the Smart Grid PDI helpdesk?

A.
24 hours per day, 7 days per week, in all time zones except GMT +1 (Cisco TAC hours)

B.
7 a.m. to 7 p,m, (0700 to 1900) in the Eastern Standard Time zone

C.
7 a.m. to 7 p.m. (0700 to 1900) in all time zones

D.
8 a.m. to 5 p.m. (0800 to 1700) in the Pacific time zone only