Let us simplify each answer to find the equivalent to 3/4
[tex]\frac{6}{12}=\frac{\frac{6}{6}}{\frac{12}{6}}=\frac{1}{2}[/tex][tex]\frac{9}{12}=\frac{\frac{9}{3}}{\frac{12}{3}}=\frac{3}{4}[/tex][tex]\frac{6}{16}=\frac{\frac{6}{2}}{\frac{16}{2}}=\frac{3}{8}[/tex][tex]\frac{6}{8}=\frac{\frac{6}{2}}{\frac{8}{2}}=\frac{3}{4}[/tex]The equivalents are B and D