Which one of the following is true regarding MPLS independent control label allocations?
A.
The LSR can always assign a label for a destination prefix, even if it has no downstream label.
B.
The LSR can assign a label for a destination prefix only if it has already receives a label from the next-hop LSR, otherwise, it must request a label from the next-hop LSR.
C.
The LSR will assign a label to a destination prefix only when asked for a label by an upstream LSR.
D.
The label for a destination prefix is allocated and advertised to all LDP peers, regardless of whether the LDP peers are upstream or downstream LSRs for the destination prefix.
E.
The LSR stores the receives label in its LIB, even when the label is not received from the next-hop LSR.
F.
The LSR stores only the labels received from the next-hop LSR, all other labels are ignored.