Which of the following is true about convergence in a frame mode environment?

Which of the following is true about convergence in a frame mode environment?

A.
Convergence after link failure is possible as soon as the IP routing protocol has converged.

B.
Frame mode MPLS does not maintain alternative paths in the LIB.

C.
Convergence after link recover is possible as soon as the IP routing protocol has converged.

D.
Frame mode MPLS maintains alternative paths in the LIB.