Yes because it is informal
#2 is correct.
Problems with the others:
#1 - best is a superlative (used to compare more than three or more things)
#3 - best is the greatest something can be so you cannot have more of it
#4 - you either use "more" OR "better" because "more better" would be just be the best
Rural and unsophisticated are the best answers
The correct answer is "influence." To explore the influence, or effect of mythical literature on contemporary literature, a reader should identify key characters, settings, and plots.
