Answer: $33.19 million
Step-by-step explanation:
From the question, we are informed that the current market value of the assets of ABCD is $86.28 million and that the call option value on the firm's assets is $53.09 million.
The market value of the firm's debt will be the difference between the market value of assets and the call option value of the firm's assets. This will be:
= $86.28m - $53.09m
= $33.19 million