Answer:
The correct answer is letter "E": Both (a) and (b) are correct.
Explanation:
Warranties on presentment state that for negotiable instruments both the issuer and the beneficiary must have full knowledge of the transaction. Besides, the issuer must sign the negotiable instrument authorizing the transaction and the document must not be altered.
In that case, Orrin is breaching the presentment warranty and if Paul knew about Sarah's signature forgery, he would be breaching the warranty as well.