C is closest. Mark-up rules of fair practice on Nasdaq
require market pricing.
The NASD views markups in excess of 5% above the prevailing
market price to be a violation of the requirements that
a broker-dealer comply with the basic principles of
fair and equitable trade. There are unique circumstances
where the relevant facts justify a markup/down of over
5%. Such markups/downs should require Compliance Department
approval prior to such charges being made.