One of the warning signs that a firm's performance measurement system is not providing adequate information is when customers do not buy, even when prices appear to be competitive. In these circumstances, which of the following statements is/are true? i. It is necessary for performance to improve relative to competitors. ii. It is desirable to benchmark in critical areas against best practice. iii. If performance is improving and sales do not improve, it must be the marketing department's fault. Group of answer choices All of the given answers ii and iii i and ii i and