I believe the answer would be A.
The word could is main word, your welcome
Answer:
Give me a minute to work this out follow me and message or if not ill just type in the comments
Explanation:
. The news report was exciting. A flash mob in costumes had ridden bicycles through town. The one that correctlycombines these two sentences into a complex sentence is
The news report was exciting because a flash mob in costumes had ridden bicycles through town.
so correct option is C
hope it helps
Usually its because of how close you were or the importance on that thing or it also can be a relatioship