If (1 + x + x²) = a + a₁x + a2x²+....+a2nx2n, then the value of n ao + a3 + 26+...... is equal to
A. a₁ + a + a₇t.......
B. a₂ + as + a8+.......
C. 3-1
D. 2ⁿ 3