An investment adviser wants to charge a monthly fee to customers that engage in frequent options trading, equal to 6% of monthly options transaction volume. the adviser includes the options transaction fee in the brochure filed with the administrator and discusses the fee with each customer that engages in options transactions. which statement is true? a the monthly options transaction fee can be charged to customers because it has been disclosed to both the adviser's customers and to the state administrator b the monthly options transaction fee cannot be charged to customers because it is excessive c the charging of a monthly options transaction fee is permitted without restriction d the monthly options transaction fee is not permitted because such fees can only be charged quarterly or annually