An internal electronic fetal monitor tracing continues to record artifact despite equipment troubleshooting and replacement...

Comprehensive and Detailed Explanation From Exact Extract–Based NCC C-EFM References:

When internal monitoring continues to record artifact despite:

Changing the scalp electrode

Ensuring correct attachment

Checking cable connections

Confirming maternal movement is not the cause

NCC requires confirmation of fetal well-being using another modality.

The correct next step is direct auscultation with Doppler or fetoscope.

Why other answers are incorrect:

Oxygen is not indicated for equipment malfunction.

Repositioning does not resolve internal FHR artifact.

Thus, Auscultate the fetal heart rate is the appropriate next step.