Answer:
It results in single answer.
Step-by-step explanation:
A research question can be defined as a question that sets out to answer and eleborate research projects. Effective research question is inevitable for a good research project.
An ineffective research question is the one that is unclear, unfocused, and answered in either 'yes' or 'no.' Such questions that can not be argued counts in ineffective research question.
In the given research question, it's ineffectiveness can be evident as it results in single answer. The question is simple and can not be argued further. Therefore, the correct answer is option B.