Editor
The fourth term of $(x-2y)^{12}$ is
Difficulty: Easy
A: 
$-2211x^{9}y^{3}$
B: 
$2227x^{2}y^{2}$
C: 
$-2391x^{9}y^{3}$
D: 
$-1760x^{9}y^{3}$