There Was a Research Gap Before the Study Was Performed

There was a research gap before the study was performed. The study results filled the research gap. In what part of the research report would the research gap be identified? In what part of the research report would the researcher's strategy for filling the research gap be reported?

A) Abstract ... References
B) Abstract ... Abstract
C) Introduction ... Discussion
D) Introduction ... Methods
E) Abstract ... Methods
F) Methods ... Methods
G) Results ... Discussion
H) Introduction ... Discussion