What is the incremental benefit in basis points $($bps$)$ for MNC$-$B$\text{'}$s net borrowing cost had there been no intermediary and MNC$-$A directly arranged a swap with MNC$-$B$?$

a$.5bps$

b$.10bps$

c$.15bps$

d$.45bps$

e$.30bps$

f$.$ None of the options in this question.