【单选题】
A <form action="/Home/Upload" method="post" >
<text>选择上传文件：</text><input name="file" type="file" id="file" />
<br /><br />
<input type="submit" name="submit1" value="上传" />
</form>
B <form action="/Home/Upload" method="post" enctype="multipart/form-data">
<text>选择上传文件：</text><input name="file" type="file" id="file" />
<br /><br />
<input type="submit" name="submit1" value="上传" />
</form>
C <form? enctype="multipart/form-data">
<text>选择上传文件：</text><input name="file" type="file" id="file" />
<br /><br />
<input type="submit" name="submit1" value="上传" />
</form>
D <form action="/Home/Upload" method="post" enctype="multipart/form-data">
<text>选择上传文件：</text><input? type="file"/>
<br /><br />
<input type="submit" name="submit1" value="上传" />
</form>
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