Give the factor form of \[6{{m}^{2}}n+9m{{n}^{2}}l+12mnl\].

• A. \[3mn(2m+3nl+4l)\]
• B. \[4mn(4m+4nl+2l)\]
• C. \[5mn(2m+2nl+l)\]
• D. \[3mn(m+2nl+2l)\]