Practice finding the signs of the answers to complex multiplication and division problems.

Problem

What is the sign of start fraction, s, start superscript, 67, end superscript, divided by, t, start superscript, 9, end superscript, end fraction, divided by, left parenthesis, 3, s, dot, start fraction, s, divided by, 4, t, end fraction, right parenthesis when s, is less than, 0 and t, is greater than, 0 ?
Please choose from one of the following options.