20.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
count = 0
data = [1, 2, 3]
data_length = len(data)
for i in range(data_length):
for j in range(data_length):
for k in range(data_length):
if data[i] == data[j] or data[i] == data[k]:
count += 1
print(count % 4)

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