Final answer:
Group 1 would have better performance because there was some memory left for the initial pairs they forgot and those links were still held in mind, option B.
Step-by-step explanation:
The most likely result when retesting both groups for memory recall of the initial pairs would be:
B. Group 1 would have better performance because there was some memory left for the initial pairs they forgot and those links were still held in mind.
This is because when tested after 2 weeks, 25% of the subjects forgot the associations between the numbers and objects. Group 1, who were asked to relearn the initial pairs they forgot, would have better performance because they still had some memory left for those pairs. Group 2, who were asked to learn new pairs, would not have the advantage of that residual memory for the initial pairs, so their performance would be lower.