FastMart, a convenience store chain, is planning to add pancake syrup to the items it sells. FastMart stores do not have shelf space to stock more than one variety of syrup. Surveys of FastMart customers indicate that one-fourth of them prefer low-calorie syrup, while three-fourths prefer regular syrup. Since FastMart’s highest priority is to maximize sales, the obvious strategy for it is to stock regular syrup.
Which of the following, if true, most seriously weakens the argument?
结论是Since FastMart's highest priority is to maximize sales，所以一定要跟sales销量有关。
C 在说价格，就算regular比low-c的价格低，可是吃regular 的人多，最终可能sales of regular 就more than those of low-ca也说不定，无关。
D 比较充分说明stock regular syrup对销量是有考量的，正确。