The correct answer is A. Arranged marriages.
Explanation
An arranged marriage is a practice commonly used by families to obtain benefits. In this practice, the parents are the ones who decide who will marry their son or daughter usually in exchange for benefits such as money, property or goods. This practice was common in past centuries and eras especially during the middle ages, during which arranged marriages in royal families were common to increase the power of monarch and nobles. However, at present, this practice is no longer a trend because people have empowered themselves to marry someone for love and not for interest and this practice only exists in a few cultures or groups. So, the correct answer is A. Arranged marriages.