DS，一个封口的半圆(半径是r)和另外一个正常的圆(半径是R)，半圆的面积小于正常的圆吗
1：r小于R
2：半圆的周长小于 另外一个正常的圆的周长
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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 statement TOGETHER are sufficient, but NEITHER statement 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