From among the following choices, identify those which are correct about operating espense perve L.It is a financial indicator over which management can evert significant control over the longer tm IL As management's control over operating expenses improves, business's operating expense percentage declines and cash flow improves. III. It is a finaricial indicator that is unaffected by changes in the competitive environment IV. It is a risk (cash) driver over which management typically has little influence a. I and II only. b. I and II only. c. Il and III only. d. III and IV only