The quality of pizza of a famous local pizza shop has deteriorated over the years. The costs of the pizzas sold by them have increased fourfold in last ten years.
Which of the following would tend to weaken the argument above ?
A. The volume of sales has increased dramatically over the last ten years.
B. Unprecedented increase in the cost of the raw material has put severe upward pressures on pizza costs.
C. It has become difficult to get good quality raw material nowadays.
D. The average level of consumer prices overall has increased twofold over the last ten years.