NST is less time-consuming and more comfortable than CST. This is because NST does not require any external stimulation of the uterus, while CST involves giving oxytocin to induce contractions. NST also does not pose any risk of preterm labor or fetal distress, which are possible complications of CST.

Choice A is wrong because NST does not provide more information about fetal status than CST. In fact, CST can detect fetal hypoxia more accurately than NST.

Choice C is wrong because NST does not have fewer contraindications than CST. Both tests have similar contraindications, such as placenta previa, multiple gestation, and previous cesarean section.

Choice D is wrong because NST does not have higher sensitivity and specificity than CST.

Sensitivity refers to the ability of a test to correctly identify positive cases, while specificity refers to the ability of a test to correctly identify negative cases.

NST has a high sensitivity but a low specificity, meaning it can detect most fetuses with hypoxia but also has many false positives. CST has a low sensitivity but a high specificity, meaning it can miss some fetuses with hypoxia but also has few false negatives.