Answer:
B. The verbal dispute between the characters gives the man the opportunity to explain his experiences to Dr. Frankenstein
Explanation:
According to the passage, the characters advance the plot by relating their experiences to Dr. Frankenstein. This is made possible because of their verbal disputes which let's them to air their views and opinions.
An independent clause is found in a compound sentence and occurs when each clause can operate as a complete sentence in it's own right.
A subordinate clause adds information but does not serve as a sentence in it's own right for example, it relies on the main clause within the sentence to make sense.
The sentence you construct would be a compound sentence and would read:
The journalist met a source at the hotel SO THAT he would get the facts for an article.
You can still have custody if you are not the real father.