【单选题】
A <STYLE TYPE="text/css">H1{color:blue}H1{font-family:Arial}>/STYLE>
B B<STYLE TYPE="text/css">H1{color:blue;fontface:Arial}>/STYLE>
C <STYLE TYPE="text/css">H1{color:blue;font-family:Arial}>/STYLE>
D <STYLE TYPE="text/css">H1{color:blue}H1{fontface:Arial}>/STYLE>
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