【单选题】Which of the following sentencescan be used to establish significanceof the research subject in the Introduction Section?
A.
The concept of voice has become central to the study of written discourse and has been researched extensively in recent decades in the field of L2 writing.
B.
Research on evaluative language in academic texts has tended, rather, to focus her on published research articles.
C.
In this study, we used computer simulation to model the aerodynamic effect of the existing safety and comfort features.
D.
However, the resulting cover is aerodynamically ineffective due to the shape of the umbrella.