C. The linkage between oceans and eccentricity explains the European Renaissance custom of using ships as asylums.
It is possible that Sergio agrees with this statement, but this possibility is not enough. We want to be certain that one person disagrees while the other agrees. With answer choice C, we have clear disagreement from Tina. However, Sergio never mentions the use of ships as asylums. It is true that he believes in the link between oceans and eccentricity, but we cannot assume that he believes this to be the reason for ship asylums.