Fund manager: over the last five years, the various stock funds managed by our company increased on average by 7 percent more in value than the market as a whole annually. Furthermore, the performance of each particular stock fund has not varied much from one year to the next, and our few investment products other than stock funds have stayed even with the market. These results show the success of our company: each year, most of our investment products have increased in value more than the market.
The debater's argument is most vulnerable to criticism on which of these grounds?
【选项】
It confuses a claim from which the argument's conclusion about the company would necessarily follow with a claim that would follow from the argument's conclusion only with a high degree of probability.
选项是否正确？