Using the given diagram, match each letter with the correct graph. Note: Each category must have at least 1 response option selected.

Rationale A: Early Decelerations: This blue line shows the FHR mirroring the contraction (D). The deceleration begins and ends at the same time as the contraction (nadir of the deceleration aligns with the peak of the contraction). This pattern is usually considered benign and is caused by fetal head compression. B: Late Decelerations: This purple line shows the FHR drop after the contraction has peaked (delayed onset). The FHR returns to baseline after the contraction is over. This pattern is typically considered non-reassuring and is associated with uteroplacental insufficiency (decreased blood flow/oxygen to the fetus). C: Variable Decelerations: This green line shows an abrupt drop in FHR that varies in shape, duration, and depth, often looking like V, W, or U shapes. Crucially, they do not consistently relate to the timing of the contractions (they are variable in their timing). These are typically caused by umbilical cord compression. D: Uterine Contractions: This red line represents the pressure/strength of the contractions (measured in mmHg or relative units). It shows the peaks and troughs of the uterine muscle tightening.