So , my sister just had baby number two . She went in for a checkup today and they decided to induce labor due to one complication or another . A few hours after being induced labor began and ended quite quickly . So quickly in fact that my mother who had went to take their other son to her house for some rest did n't have time to get back to the hospital .

Based on the preceding passage, choose your answer for question What may be the reason why it was n't long before baby number two entered the world ?
Available choices:
I. They took supplements that helped the baby come out faster ..
II. They knew how to breathe to make it go quicker ..
III. After baby number one , it usually takes less time for the babies to be born ..
IV. They had to have a c - section ..
The answer is:
III.