how many user-configured routing instances have active routes?

Refer to the Exhibit.

— Exhibit —
user@srx240< show route summary
Router ID.
inet.0: 3 destinations, 3 routes (3 active, 0 holddown, 0 hidden)
Direct: 1 routes, 1 active
Local: 1 routes, 1 active
StatiC. 1 routes, 1 active
customer-A.inet.0: 3 destinations, 3 routes (3 active, 0 holddown, 0 hidden)
Direct: 1 routes, 1 active
Local: 1 routes, 1 active
StatiC. 1 routes, 1 active
customer-B.inet.0: 4 destinations, 4 routes (4 active, 0 holddown, 0 hidden)
Direct: 1 routes, 1 active
Local: 1 routes, 1 active
OSPF. 1 routes, 1 active
StatiC. 1 routes, 1 active
customer-B.inet6.0: 5 destinations, 5 routes (5 active, 0 holddown, 0 hidden)
Direct: 2 routes, 2 active
Local: 2 routes, 2 active
StatiC. 1 routes, 1 active

— Exhibit —
In the output, how many user-configured routing instances have active routes?

A.
1

B.
2

C.
3

D.
4

Explanation:

Reference:http://www.juniper.net/techpubs/en_US/junos11.4/topics/reference/commandsummary/show-route-summary.html#jd0e185