Answer:
b) "Captain Dall and Will Osten are planning a counterplot which might go wrong"
Explanation:
The underlined language in paragraph 8 is used to create tension since there is a sudden risk that things will not go as planned for Captain Dall and Will Osten.
This means that things may go wrong, and both of them may be pressured by the future consequences of their intentions and actions toward others, but they will do it anyhow in order to spoil the fun of others and prevent them from having fun.