[Banking Problems] Celine Is a Loan Officer at ABC Bank

[Banking Problems] Celine is a loan officer at ABC Bank. Being somewhat dishonest, Celine tells Rohan, a customer of the bank, who is wealthy and rarely checks the status of outstanding loans and balances that she is collecting money for a local animal shelter. She asks him to sign a pledge that he will contribute $50 to the animal shelter. However, through covering pertinent terms of the document, Celine actually had Rohan sign a promissory note made out to her for $5,000, which she later endorsed to Miguel. After leaving the bank, Rohan proceeded to one of his businesses, a used car dealership. Taylor comes in to purchase a used car. He and Rohan agree that Taylor will purchase a car for $3,000. Zoe also comes in, and she and Rohan agree that she will purchase a used car for $4,000. Both Taylor and Zoe make out promissory notes payable to Rohan. At the end of the day, Rohan is looking through the notes and decides that Taylor's was mistakenly made out for $3,000 when it should have been $3,500. Rohan mistakenly, but honestly, believes that the deal was for $3,500. Therefore, he changes the note to reflect that Taylor owes $3,500. Rohan, on the other hand, simply does not like Zoe. He decides that $4,000 was not enough for the car. Accordingly, he changes the note to $4,500.
-Which of the following is true regarding Zoe's liability to Rohan?

A) Because of the fraudulent alteration, Zoe is not liable to Rohan for any amounts under the promissory note.
B) Zoe's obligation will be enforced only to the amount of $4,000 if payment is to be made to Rohan; but if the note has been negotiated to another holder, Zoe is liable for $4,500.
C) Taylor's obligation will be enforced only to the amount of $3,000 if payment is to be made to Rohan; but in the event the note is negotiated to a holder in due course, Taylor is liable for $3,500.
D) Unless Zoe has a written document from Rohan to the effect that the agreement was for $4,000 only, Zoe and Rohan will be legally required to split the remainder with Zoe being held responsible for $4,250.
E) Zoe is liable for $4,000 regardless of whether or not Rohan has negotiated the note to another party.