A nurse is reviewing a client's cardiac rhythm strips and notes a constant P-R interval of 0.35 seconds. Which of the following dysrhythmias is the client displaying?

A. Atrial fibrillation shows irregular, rapid atrial activity with no P waves. B. Complete heart block (third-degree AV block) features no relationship between P waves and QRS complexes. C. A P-R interval > 0.20 seconds (normal: 0.12-0.20 seconds) indicates a first-degree AV block, meaning delayed conduction through the AV node. D. Premature atrial complexes (PACs) present as early P waves that may differ in shape from normal ones.