I believe the answer is: criticism
By making criticism, we could expose our partner on his/her weaknesses and focusing on that weakness to evoke a certain negative emotion. By doing this, the focus of their discussion could be strayed from our own weakness/insecurities and could be used to avoid responsibility when we're in a fight with our partner.
Answer:
which case??plessy vs. burgison?(or however you spell it)
Quantity demand is the demand for goods in a considerable amount or size....