Considering Only the Issue of Terminology,not the Issue of Handwriting

Considering only the issue of terminology,not the issue of handwriting or whether Paula properly performed,which of the following is true regarding whether the language "I,John Jones,owe Paula Smith $50" is insufficient to establish elements required for a negotiable instrument?

A) The language is sufficient because it acknowledges the debt, and that is the only required standard.
B) The language is insufficient because it only acknowledges the debt and is not a promise to pay.
C) The language is sufficient only because the instrument is in an amount under $500.
D) The language is sufficient because it acknowledges the debt and is also a promise to pay.
E) The language is sufficient because it acknowledges the debt and is unconditional.