Final answer:
A transient ischemic attack (TIA) does not feature symptoms that persist for longer than 24 hours; this is the key difference from an ischemic stroke.
Step-by-step explanation:
A transient ischemic attack (TIA) is characterized by neurological symptoms that are temporary and resolve within 24 hours due to restoration of adequate blood flow. Unlike a TIA, an ischemic stroke involves symptoms that persist for longer than 24 hours, possibly leading to permanent damage. Therefore, option B) symptoms that persist for longer than 24 hours is not characteristic of a TIA and does not fit the description. However, symptoms such as weakness or paralysis to one side of the body, or an acute onset of confusion and slurred speech, are common features of both a TIA and an ischemic stroke.