Concept:"Shall" with a third-person subject expresses determination, promise, or a fixed decision, not a simple future possibility.
Explanation:The statement uses "shall" with "Bolu," which makes the arrangement definite and firm.
The definite article "the M.C." refers to one specific role.
So the sentence means the speaker has decided that Bolu will be the M.C., not that Bolu may be.
It also does not suggest that Bolu will become an M.C. later in life.
Since Bolu will certainly take that particular role, no one else will fill it.
Answer:B. no one else will be the M.C.