Which of the following accurately describes rules and responsibilities relating to advertisements made for a tax practitioner?

a$.$ Any published advertising guidelines for pricing$/$discounts must be adhered to for at least thirty $(30)$ days after publishing

b$.$ Web advertisements are held to a higher standard than those in print

c$.$ The practitioner can use official IRS logos$,$ names, and other intellectual property as long as they use a disclaimer

d$.$ Practitioners are not allowed to use pricing descriptions in their advertisements