Final answer:
The disadvantages of primary data collection are that it is costly and time-consuming, and it has limited scope and generalizability. The other options listed do not inherently describe the disadvantages of primary data collection.
Step-by-step explanation:
Disadvantages of primary data collection include options a) Costly and time-consuming and b) Limited in scope and generalizability. Collecting primary data can indeed be expensive and require significant time investment, from the planning stage through to data collection and analysis. Moreover, the scope of primary data is often limited to the sample from which it was collected, which can reduce the ability to generalize the findings to a larger population.
While c) Can be outdated or inaccurate and d) Provides firsthand, specific information listed, they don't inherently describe the disadvantages of primary data collection. Primary data, by definition, is current as it is collected in real time, and while inaccuracies are possible in any research, this is not a specific drawback of primary methodology. Additionally, providing firsthand, specific information is an advantage of primary data collection, as it yields direct insights relevant to the research question.