What interval includes all possible values of x , where negative 3 times open paren 6 minus 2 x close paren is greater than or equal to 4 x plus 12 ?
A
left bracket 15 comma infinity right parenthesisB
left bracket negative 3 comma infinity right parenthesisC
left parenthesis negative infinity comma negative 3 right bracketD
left parenthesis negative infinity comma 15 right bracket