a,b,c,d are integers. 1 ≤ a,b,c,d ≤ 9.(a+d)(b+c)=?
1：abcd+dcba=7557.
2：abcd+ dba =1957
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AStatement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
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BStatement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
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CBoth statements TOGETHER are sufficient, but NEITHER one ALONE is sufficient.
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DEACH statement ALONE is sufficient.
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EStatements (1) and (2) TOGETHER are NOT sufficient.
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正确答案: D