Ryan Signs an Instrument Using an "R" with a Circle

Multiple Choice

Ryan signs an instrument using an "R" with a circle around it.With this mark for a signature,the instrument is

A) negotiable.
B) nonnegotiable,because an initial does not state the signer's name.
C) nonnegotiable,because this mark is a symbol,not a signature.
D) nonnegotiable,because a simple mark implies a lack of serious intent.