Which standard component can UMS leverage if it elects to use Partner Central template?

Ursa Major Solar (UM5) is planning to build a portal for its partners. Among other things, UMS will be distributing leads to its partners in the portal.

Which standard component can UMS leverage if it elects to use Partner Central template?
A . Lead Distribution
B. Lead Inbox
C. Lead Selector
D. Lead Flow

Answer: B