Suppose the world supply curve is p equals 20 plus 0.02 Upper Q Subscript font size increased by 1 s, and the demand curve of other countries of the world is p equals 80 minus 0.02 Upper Q Subscript Upper D. The excess or residual supply function is A. Upper S Superscript r Baseline (p )equals negative 5 comma 500 plus 100 p. B. Upper S Superscript r Baseline (p )equals negative 6 comma 000 plus 100 p. C. Upper S Superscript r Baseline (p )equals negative 5 comma 000 plus 100 p. D. Upper S Superscript r Baseline (p )equals negative 3 comma 900 plus 100 p. The excess or residual supply at a price of $60 is