78. 在下列程式片段中,其執行之輸出結果為何?
Dim s1, s2 As String
s1 = "DCBA"
s2 = "E"
For i = 3 To 1 Step -1
s2 = s2 + Right(s1, i)
Next i
Print s2

(A)EDCBA

(B)EABCBCC

(C)ECBABAA

(D)EABCD

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