Which of the Following Is True Regarding Isaiah's Plan to Rely

Which of the following is true regarding Isaiah's plan to rely on the due diligence defense?

A) He will be able to do so only if he can establish that the purchasers would have had reasonable grounds to question the prospectus had they reviewed it with due diligence.
B) He will be able to do so if he can establish that the purchasers would have had reasonable grounds to question either the registration statement or the prospectus had they reviewed them with due diligence.
C) He will not be able to use that defense unless he can establish that he reviewed the registration statement and the prospectus,and had reasonable grounds to believe that the registration statement was accurate with no omission of material facts.
D) He will not be able to rely on that defense because he is an issuer.
E) He will be able to do so only if he can establish that the purchasers would have had reasonable grounds to question the registration statement had they reviewed it with due diligence.