Provided is an ECG image of sinus tachycardia. Identify the wave pattern and describe its characteristics.

The wave pattern shows a regular sinus rhythm with a heart rate greater than 100 beats per minute.

The wave pattern shows a regular rhythm with a heart rate between 60 and 100 beats per minute.

The wave pattern shows an irregular rhythm with P waves that change in morphology.

The wave pattern shows a rapid rate with no visible P waves and narrow QRS complexes.