The correct answer is option D) "Each user was asked to work a certain number of days each year". The acequia maintenance was a project in New Mexico which aimed to to preserve the acequias and understand how they are linked to socioeconomics, culture, hydrology and the ecosystems in northern of New Mexico. In order to maintain the acequias systems that were the object of study and preservation, each user in the study was asked to work certain number of days each year.
