Final answer:
Based on the provided information regarding Jeremiah's premature birth and movement difficulties, the correct diagnosis is cerebral palsy, which is a neurological disorder caused by brain injury affecting muscle coordination and movement.
Step-by-step explanation:
Jeremiah Walmer is described as having difficulty moving his extremities and requiring therapy to prevent contractures, indicating a condition that primarily affects muscle coordination and movement. This description, along with the provided speech from the 2nd event detailing Jeremiah's premature birth and subsequent muscle movement challenges, points to a diagnosis of cerebral palsy. Cerebral palsy is often caused by brain injury occurring before, during, or shortly after birth and can manifest in symptoms ranging from weak muscles to difficulty with walking and talking. With this understanding, the correct answer to the student's question is A. Jeremiah has cerebral palsy.