Problem: In experiments investigating proactive interference (e.g., Wickens et al.), researchers found that semantic factors (i.e., the meaning of the words) influence how information is stored in short-term memory and can influence how much proactive interference we experience. Participants saw 3 words that were types of fruit and had to immediately recall them. This procedure repeated for three trials (with different words on each trial). Which of the following groups had the best memory on the fourth/final trial?