In analyzing its current year operating performance, Merle Co. determined that its return on assets improved significantly from the prior year. Total assets and operating expenses were stable and overall debt decreased, while net earnings increased due to greater sales volume. An additional 50,000 shares of common stock were authorized during the year. Which of the following statements best explains Merle's improved return on assets in the current year? Merle made more efficient use of its assets. Merle made more efficient use of its cash flow. Merle increased its outstanding capital Merle decreased its operating expenses