Final answer:
The Contraction Stress Test (CST) measures the fetal heart rate's response to the stress of uterine contraction, determining the fetus's ability to withstand labor.
Step-by-step explanation:
The measure that assesses the response of fetal heart rate (FHR) to the stress of uterine contraction is c) Contraction Stress Test (CST). The CST is a prenatal test that evaluates the fetus's ability to withstand the stress of labor by inducing contractions and monitoring for signs of fetal distress. During this test, the fetal heart rate is monitored while contractions are artificially induced to evaluate how the baby's heart responds to stress. This test helps to determine if the baby is getting enough oxygen during contractions. Fetal distress is often indicated by a sustained decrease or increase in FHR, and the test helps to determine if it is safe for the fetus to go through labor or if alternative delivery methods such as Caesarian section may be necessary.