Compared with the original data collection method, the advantage of the second-hand data collection method is ().

Compared with the original data collection, the second-hand data research cost is lower, the data is easy to obtain and the data collection time is shorter. At the same time, second-hand data can help to define or redefine the research topic in exploratory research, provide an alternative method to collect original data, remind market researchers of potential problems and difficulties, provide necessary background information, and even provide some practical solutions to problems. Options b and d are characteristics of the original data collection method.