Studies indicate that potential buyers of an expensive product are more likely to go through with their purchase if they have first made a purchase of a related product, such as a less expensive product sold by the same company in the same place. Psychologists attribute this behavior to commitment bias, in which people's present actions are influenced by a desire to act consistently with their past actions. A company that sells expensive products will increase sales of these items by first inducing customers to buy less expensive, easy-to-sell items.
Which of the following, if true, most strongly supports the recommendation above?
【选项】
Commitment bias has been found to be equally strong for purchases made by cash and by credit card.
选项是否正确？