NF- $\kappa$ B Can Activate Genes During the Immune Response by a by a Protein

NF- $\kappa$ B can activate genes during the immune response by a protein kinase that

A) phosphorylates the transcription factor NF- $\kappa$ B to activate it.
B) phosphorylates the inhibitory factor I $\kappa$ B, causing it to be degraded and to release NF- $\kappa$ B.
C) phosphorylates a MAP kinase to initiate its cascade.
D) activates a phosphorylase that removes an inhibiting phosphate from the NF- $\kappa$ B.