A.a{text-decoration:0;} B.a{text-decoration:none;} C.a{text-underline:none;} D.a{text-underline:0;}
A.tr:nth-child(3n+4) B.tr:nth-child(2n+3) C.tr:nth-child(1n+4) D.tr:nth-child(3n+1)
A.nav B.sidebar C.section D.list