an investment adviser has researched a promising company and has decided to buy its stock for its proprietary account and for the account of each of the firm's clients. which action on the part of the adviser is acceptable? a the investment adviser first buys the shares for its proprietary account and then places the orders necessary to buy the shares for its customers' accounts b the investment adviser first buys the shares for its customer accounts and then places the order necessary to buy the shares for its proprietary account