import numpy as nparr3d = np.array([[[1, 2, 3], [4, 5, 6]], [[7, 8, 9], [10, 11, 12]]])arr3d[0] = 42arr3d下列哪个为正确结果( )
A. array([[[42, 42, 42], [42, 42, 42]], [[ 7, 8, 9], [10, 11, 12]]])
B. array([[[42, 2, 3], [4, 5, 6]], [[ 7, 8, 9], [10, 11, 12]]])
C. array([[[42, 42, 42], [4, 5, 6]], [[ 7, 8, 9], [10, 11, 12]]])
D. array([[[42, 2, 3], [42, 5, 6]], [[42, 8, 9], [42, 11, 12]]])