Answer: A
It may not follow a chronological order
D is the answer to your question
It could possible be ironic because the rest of the world was technically already "discovered", but just not by the Europeans specifically. Therefore it is ironic, simply because they are Naive
In order to use more precise language, the underlined phrase entitled (7) should be changed to A: inaugural.
Then, the proper phrase would be:
Olympic marathoner Jeff Galloway won the inaugural race in 1970 when traffic was not even blocked off for the race, and runners had to run in the far right-hand lane.
Answer:
B (the one you selected)
Explanation:
A is not right since many stories use more than one theme, especially in arcs.
C is not right since the subject is what the story is about, which can not line up with the theme.
D is not right because most real world examples do not do this.