People listen at no better than a efficiency rate. A. 60 percent B. 30 percent C. 80 percent D. 25 percent E. 50 percent

D. 25 percent

Explanation:

The efficiency rates is the rate of the most accurate and reliability and the studies have show form the 10 minutes oral presentation that the average listener had heard and understood and retained abt 50% of what was said with the duration of the 48 hours and thereby slowly dropped to about 50 percent and then to about 25% of the efficiency.