The primary difference between the$$ "payoff" and the$$ "purchase and$$ assumption" methods of handling failed banks is

A$.$ that the FDIC guarantees all deposits when it uses the$$ "payoff" method.

B$.$ that the FDIC guarantees all deposits when it uses the$$ "purchase and$$ assumption" method.

C$.$ that the FDIC is more likely to use the purchase and assumption method for small institutions because it will be easier to find a purchaser for them compared to large institutions.

D$.$ that the FDIC is more likely to use the$$ "payoff" method when the bank is large and it fears that depositor losses may spur business bankruptcies and other bank failures.