Which of the Following on Appeal Was the Result in DIF

Which of the following on appeal was the result in DIF Bank Deutsche Investitions Finanz GMBH v. Fluormatic Corporation of America, the case in the text in which the defendant claimed that drafts were not negotiable because they were not payable in a "sum certain" because they were payable in German deutsche marks and did not specify an exchange rate?

A) That the drafts were not negotiable because they were payable in German deutsche marks regardless of whether an exchange rate was specified.
B) That the drafts were not negotiable because they were payable in German deutsche marks and an exchange rate was not specified.
C) That the drafts were not negotiable because they were payable in German deutsche marks, did not specify an exchange rate, and were presented for payment after the exchange rate changed in excess of 5% after the drafts were issued.
D) That the drafts were negotiable but only because they specified an exchange rate.
E) That the drafts were negotiable regardless of whether or not they specified an exchange rate.