In monitoring labor progress using a partograph, if the cervical dilation curve crosses the alert line, what does it signify?

Correct option is B

Crossing the alert line on a partograph indicates slow cervical dilation and possibility of obstructed labor → requires referral or intervention.
Explanation of options: (a) ✘ Staying left of alert line = normal progress. (b) ✔ Correct; crossing alert line = abnormal, labor slowing. (c) ✘ Not all cases need C-section; depends on assessment. (d) ✘ Second stage = full dilation, not alert line crossing.