An enterprise customer A with provider-independent address space is dual-homed to two ISP. Which two options , when combined, allow for customer A to efficiently achieve out-bond traffic load…

AS path prepending is an inbound traffic engineering tool that influences how remote autonomous systems prefer one ISP path to reach the customer's prefixes, not which exit the customer uses for outbound traffic.

MED is used to influence inbound path selection from a single ISP with multiple entry points; it does not control which ISP the customer chooses for outbound traffic.

Accepting a default route from both ISPs gives the customer router a viable next-hop exit path through each ISP, which is the baseline requirement for distributing outbound traffic.

Route reflectors are an iBGP scalability mechanism that eliminates full-mesh iBGP requirements within a single AS and have no effect on outbound traffic distribution across upstream ISPs.

Accepting more specific routes from both ISPs and their direct peers provides richer BGP RIB information, enabling the customer's BGP decision process to select different exits for different destination prefixes and achieve granular outbound load sharing.