Context: One group of 12 mothers had cesarean sections and the other delivered naturally ( vaginally ) . All women were interviewed and given brain scans two to three weeks after giving birth . During the brain scans , parents listened to recordings of their own baby 's cry during the discomfort of a diaper change .

Question: Why did the one group have c - sections ?
Options:
0. The one group had fear of birth so had c - sections .
1. The one group elected to have c - sections .
2. None of the above choices .
3. The one group had babies that did n't drop in the womb so they needed c - sections .
Answer: 3