B. external conflict with other citizens who don't want the cinema.
Explanation:
Option B is the correct answer.
From the author's letter, we discover that there are two groups of citizens that were presented. One group are those that actually wanted the cinema to be built in Havenswood while the other group are those who weren't in support.
The type of conflict that is seen is an external conflict between the two groups. The building of the Havenswood cinema is thrilling for the first group while others see it as something that will disturb their quiet town.
