The tax on a commodity is diminished by 19% and its consumption increased by 15%. The effect on revenue is?  Choose the correct choice from the following choices
A) 2%	B) 8.85%	C) 5.85%	D) 6.85%	E) 1%
100 * 100= 
<gadget id="calculator">100 * 100</gadget>
<output>10_000</output>
10000   81 * 115= 
<gadget id="calculator">81 * 115</gadget>
<output>9_315</output>
9315   -----------   10000-----------685   100-----------?=&gt; 6.85% decrease   Answer: 6.85%
<result>D</result>
The tax on a commodity is diminished by 19% and its consumption increased by 15%. The effect on revenue is?