The Client's ECG Shows Normal-Appearing P Waves That Occur at Regular

The client's ECG shows normal-appearing P waves that occur at regular intervals. Every third impulse from the atria is missing a QRS complex. The nurse would recognize this pattern as the dysrhythmia of

A) first-degree AV block.
B) second-degree AV block.
C) third-degree AV block.
D) fourth-degree AV block.