Statement: An announcement: Passengers in their own interest are advised to fasten their seat belts while seated in the trolley of the ropeway.Assumptions:People are always careful about their own safety.Unless advised, passengers might not use the seat belts.

Statement: An announcement: Passengers in their own interest are advised to fasten their seat belts while seated in the trolley of the ropeway.
Assumptions:
People are always careful about their own safety.
Unless advised, passengers might not use the seat belts.

Only assumption I is implicit

Only assumption II is implicit

Either I or II is implicit

Both I and II are implicit

Explanation:

Answer: Option D
Explanation:
The stress on in their own interest in the statement indicates that people should use seat belts for their own safety. So, I is implicit. Besides, the announcement has been made to caution passengers to be careful if they want to enjoy a safe ride. So, II is also implicit.