Final answer:
Cross-national research encounters issues such as language barriers and cultural biases, which can hinder effective communication and lead to misunderstandings or skewed results in research studies.
Step-by-step explanation:
The issues where cross-national research is concerned are: A) Language barriers; cultural biases. These barriers to research across nations can make it challenging to conduct studies that are effectively communicated and culturally relevant across different populations. Language barriers can prevent researchers from gaining a full understanding of local contexts, and cultural biases may influence researchers' interpretations and interactions, leading to skewed results or misunderstandings. Language is not only a tool for communication but also an integral part of culture, shaping family, authority, and gender relationships, which can vastly differ from one country to another. Cultural biases further compound these issues, as they can lead to researchers applying their own cultural norms and values to data interpretation, which can be misleading.