我院I类手术切口感染率按规范要求是多少（）

A.≤1%

B.≤2%

C.≤3%

D.≤4%

A.1%

B.2%

C.5%

D.10%

A.15%

B.1.5%

C.3%

D.4%

A.15%

B.1.5%

C.3%

D.4%

A.15%

B.1.5%

C.3%

D.4%