Which BGP option is required when load sharing over multiple equal-bandwidth parallel links from a single CE router to a single ISP router over eBGP?

Koraa

The preferred answer should be A.

To enable EBGP multipath load balancing, the ‘maximum-paths’ command is used.

http://www.cisco.com/c/en/us/td/docs/ios/12_2sx/feature/guide/fsxeibmp.html

eBGP multihop is used to establish neighborship between nodes not directly connected.

BGP synchronization: a route should be learned through IGP by all routers in an AS to pass transit traffic.