Final answer:
The recognition test will be the easiest for Bob because he only needs to identify information he has previously learned.
Step-by-step explanation:
Out of the three memory tests - recall, recognition, and word fragmentation - the recognition test is the easiest for Bob to complete. In the recognition test, Bob is presented with information that he has previously learned and simply needs to identify whether he recognizes it or not. Unlike the recall test, which requires Bob to retrieve information from memory without cues, or the word fragmentation test, which may require him to remember specific details, the recognition test provides a clear and direct prompt for Bob, making it easier for him to answer.