Loftus and Palmer (1974) conducted an experiment in which participants estimated the speed of a car described as either contacting or smashing into another. To which of the following conclusions regarding eyewitness memory is this study most relevant? The presence of a weapon attracts witnesses' attention, impairing their memory. Child eyewitnesses are especially suggestible. Eyewitness memory can be heavily influenced by leading questions. Eyewitnesses' confidence is only weakly related to eyewitness memory.