Circular $230,10\mathrm{.}34$ discusses standards for advising clients with respect to tax return positions and for preparing or signing returns. Which of the statements below is true?

Question $13$Select one:

a$.$

A practitioner may not sign a tax return as a preparer if the practitioner determines that the tax return contains a position that does not have a realistic possibility of being sustained on its merits $($the realistic possibility standard$)$ unless the position is not frivolous and is adequately disclosed to the Internal Revenue Service

b$.$

A practitioner advising a client to take a position on a tax return, or preparing or signing a tax return as a preparer, must inform the client of the penalties reasonably likely to apply to the client with respect to the position advised, prepared, or reported

c$.$

A practitioner advising a client to take a position on a tax return, or preparing or signing a tax return as a preparer, generally may rely in good faith without verification upon information furnished by the client. The practitioner may not, however, ignore the implications of information furnished to$,$ or actually known by$,$ the practitioner, and must make reasonable inquiries if the information as furnished appears to be incorrect, inconsistent with an important fact or another factual assumption, or incomplete

d$.$

All of the above are correct