Though Definitions of Marketing Research and International Marketing Research Are

Though definitions of marketing research and international marketing research are basically the same,there are two distinct complications that impact international marketing research.Which of the following would be one of those complications?

A) International marketing research is always more expensive than domestic research.
B) International marketing research is very poor when it comes to promotional studies.
C) International marketing research is better with respect to cultural research because it involves more cultural information.
D) Information must be communicated across cultural boundaries.
E) Inaccuracies interpreting respondents answers in international marketing research due to language barrier.