It would be "<span>"c) the no-third-term rule" that is not an example of governance that developed by custom, since this was only implemented after FDR won an unprecedented number of terms as president of the United States. </span>
It's either A or B, I'm leaning towards A.
The north by England, Mexico and central part by the Spanish and Brazi by Portugal
Based on Ayn's quote it seems that he would agree with A) a policy that supports entrepreneurs by building incentives to create new jobs. He thinks that individual interests, competition and private initiative are key factors in creating economic wealth. He would support a lasseiz-faire type of economy where the private sector is the most important actor and entrepreneurs can thrive and be rewarded by their efforts.