Which of the following are differences between a Specialist ,in the Specialist System used on PHLX and AMEX, for instance, and an Order Book Official(OBO) in the Competing Market Maker System used on the CBOE)?
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a) Specialists may trade for their own account; OBOs may not.
b) OBOs may trade for their own account; Specialists may not.
c) Specialists are exchange employees; OBOs are employed by a member firm.
d) OBOs are exchange employees; specialists are employed by a member firm.
e) Specialists are assigned specific option classes; OBOs are not.
f) a and d