As regards memory, the brain responds best to repeated patterns, such as the melodic and rhythmic patterns of music. This is why we can remember long strings of information or text, which would normally be impossible to memorize, when they are put to music. Given that music aids memory, it might seem that funny jokes would be easy to remember, since, like music, they normally elicit an emotional response in us. However, jokes are usually very difficult to remember, since . __. Which one of the following most logically completes the passage? ['for most people, certain memories elicit a strong emotional response', 'people can hold in short-term memory only a few chunks of unpattemed information at a time', 'jokes work not by conforming to repeated patterns but by breaking them', 'jokes, unlike music, always have content that is verbal or at least clearly symbolic']