I would say that the answer would be D. The conjunction would be the word yet.
Do you have any text clues or a picture that might help people to answer?
Hey there do you have a question i can help you with
<u>Explanation:</u>
In research writing, been guided by a cause refers to writing objectively. This objective or cause is usually<em> </em><em>mentioned in the research question or statement of purpose of a research.</em>
For example, a research question may read;
'<em>What is the relationship between body weight and peoples attitudes towards junk food?
'</em>
In the above research question, it becomes clear to readers that the research would be guided towards getting answers to the question-which is the cause.