Answer:
The correct answer is letter "A": attempts to reveal why or how one variable produces changes in another.
Explanation:
Causal-explanatory research is conducted to identify cause-effect relationships between variables. This study focuses on analyzing events or specific problems to determine relationships with their effects.
In business, for instance, causal-explanatory research is useful to determine the influence of direct investment over a foreign country, the impact of re-branding in consumer's loyalty, or the impact of changing the current method of manufacturing in employees.