Final answer:
Outdated information is a disadvantage of secondary research, while high cost is a disadvantage of primary research.
Step-by-step explanation:
The answer to the multiple-choice question is that outdated information is a disadvantage of secondary research, while high cost is a disadvantage of primary research. Secondary research, such as analyzing existing data sets and scholarly articles, can sometimes lead to outdated or irrelevant information for the current study. Conversely, primary research, which includes methodologies like interviews and surveys, often requires more resources like time and money, hence implicating high cost as a disadvantage. These distinctions between primary and secondary research inform researchers on what to expect when determining the suitable methodologies for their studies.