**Core Concept**
Deep transverse arrest refers to a situation during labor where the fetal head is arrested in a transverse position, usually in the mid-pelvis, after the cervix is 4-5 cm dilated. This condition requires prompt intervention to prevent prolonged labor and fetal distress.

**Why the Correct Answer is Right**
The correct approach to deep transverse arrest involves assessing the fetal head's position and station, followed by manual rotation to facilitate a more favorable position for delivery. This can be achieved through a combination of external cephalic version (ECV) and/or internal cephalic version (ICV) under ultrasound guidance. In some cases, a cesarean section may be necessary if the labor is prolonged or if there are signs of fetal distress.

**Why Each Wrong Option is Incorrect**
**Option A:** Oxytocin augmentation is not the primary treatment for deep transverse arrest, as it may actually worsen the situation by increasing uterine contractions without improving the fetal head's position.

**Option B:** Performing a cesarean section without attempting manual rotation or ECV is not the first line of treatment, as it may be considered a last resort after other interventions have failed.

**Option C:** Resting in the lithotomy position may not be beneficial in this scenario, as it does not address the underlying issue of the fetal head's position and may prolong labor.

**Clinical Pearl / High-Yield Fact**
In cases of deep transverse arrest, it's essential to remember that a prolonged labor can lead to fetal distress and increased risk of cesarean section. Early recognition and prompt intervention are crucial to prevent these complications.

**Correct Answer: C. Resting in the lithotomy position.