When Does a "Financing Gap" Occur

When does a "financing gap" occur?

A) When a firm raises capital in the market by selling unequal amounts of bonds and equity, and the gap is the difference between the two amounts.
B) When firms are unable to find investors to purchase their securities.
C) When there is a period of time occurring between cash outflows from a project and the cash inflows from the project financing.
D) Each of the above is an example of a financing gap.