Fans were very excited to see the final installment of the Royal Battleground trilogy. Hundreds of eager viewers lined up outside the movie theater days in advance. Which choice most effectively combines the two sentences at the underlined portion?

fans were so excited to see the final installment of the royal battleground trilogy that they

Explanation:

This sentence can be transformed to have logical flow and conciseness by removing the full-stop and then substituting "hundreds of eager viewers" with "that they". It becomes a well-understandable sentence with great meaning. Hence the resultant sentence becomes: "Fans were very excited to see the final installment of the Royal Battleground trilogy that they lined up outside the movie theater days in advance."