The figure to the right shows the rate at which a country's oil was produced and imported between 1920 and U.S. Oil Production and Imports 2005 in units of millions of barrels per day. The total amount of oil produced or imported is given by the area 20 under the corresponding curve. Be careful with the units because both days and years are used in this data set. Production 16- Answer parts a and b below. Milbon barrel day Imports 1920 1940 1960 1980 2000 Year a) Use numerical integration to estimate the amount of oil produced between 1940 and 2000. Use any method and experiment with values of n. Choose the correct answer below. O A. 3.40 x 101 barrels O B. 6.60 x 1011 barrels O C. 3.40 x 1010 barrels O D. 6.60 x 1010 barrels