A certain olive orchard produces \(315\) gallons of oil annually, on average, during four consecutive years. How many gallons of oil must the orchard produce annually, on average, during the next six years, if oil production for the entire \(10\)-year period is to meet a goal of \(378\) gallons per year?
A. \(240\)
B. \(285\)
C. \(396\)
D. \(420\)
E. \(468\)
OA D