A firm's research department issues a research report on ABC Corp. and changes its recommendation from "Reduce" to "Accumulate." Based on this information a registered representative calls all his clients and tells each one to: "Use all available cash to buy as much ABC Corp. stock as you can immediately." This action by the registered representative is:

A appropriate since the recommendation is based on the firm's research

B appropriate only if the proposed investment is not too risky for the customer

C not appropriate because it induces the customer to invest beyond his financial capacity

D not appropriate because it makes a recommendation based on inside information