Which configuration is required to enable the exporter?
Refer to the exhibit.

A.
cache timeout active 60

B.
next-hop address

C.
cache timeout inactive 60

D.
source Loopback0

Explanation:
http://www.cisco.com/c/en/us/td/docs/routers/crs/software/crs_r4-2/netflow/configuration/guide/b_netflow_cg42crs/b_netflow_cg42asr_chapter_00.html#task_1068377
Exporter Map Overview
An exporter map contains user network specification and transport layer details for the
NetFlow export packet. The flow exporter-map command allows you to configure collector and version attributes. You can configure the following collector information:
Export destination IP address
DSCP value for export packet
Source interface
UDP port number (This is where the collector is listening for NetFlow packets.)
Transport protocol for export packets