23.執行以下Python程式片段，其結果為何？[商技111]
(A) 0
(B) 1
(C) 2
(D) 3
a = [[0] * 4 for _ in range(4)]
for i in range(4):
for j in range(4):
if j % 2 == 0:
a[i][j] = 2
else:
a[i][j] = 1
for i in range(1, 4):
for j in range(1, 4):
a[i][j] = a[i - 1][j] + a[i][j - 1]
print(a[3][3] % 4)

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