Answer:
C. in the rainy season
Explanation:
The roads are often impassable <u>in the rainy season</u>, but year-round air and ferry services are available.
The narrator can be a witness or a reteller of events.
The narrator is a character in the story.
Just search about south Korea and the put in your own words to write it , Hope you can.
My best wishes , All the best
A shift in thought can be indicated by the use of C. an em dash.
An em dash is used to set of an interruption that is closely relevant to the sentence but is not grammatically part of it. These set of interruptions can be found in a list, illustration, restatement, shift in thought or tone, summary, or dramatic point.
Semicolon (;) is used to connect independent clauses.
Ellipses (. . .) are used to indicate that material is missing in the sentence or passage.