Final answer:
Suzy might have used subjective information such as the power of the Ford brand to make her purchase decision.
Step-by-step explanation:
The piece of information that Suzy might have used subjective information is B. The power of the Ford brand. Subjective information is based on personal opinions, tastes, or preferences, rather than objective facts. In this case, Suzy's decision to purchase the Ford Fusion car could have been influenced by her personal perception of the Ford brand and its reputation. While choices A and C (miles per gallon and price of the car) can be objective factors that can be measured or verified, and choice D (availability of a certain color) can be a personal preference, choice B is an example of subjective information as it is based on personal perception and brand reputation.