Final Answer:
Trang is always first and Sara cannot be second unless Trang is first, thus the correct option is A.
Explanation:
The statement given in the question is 'Sara cannot be second unless Trang is first.' This statement implies that Trang must be first in order for Sara to be second. This means that Trang is always first and Sara is always second. Therefore, Option A is the correct answer as Trang is always first and Sara cannot be second unless Trang is first.
The other options are not true as Option B states that Trang is never first, Option C states that Sara is always second, and Option D states that Sara is never second. All of these statements are incorrect as the given statement implies that Trang must be first in order for Sara to be second. Therefore, Option A is the only valid option.
The given statement implies that the order of the two individuals is fixed and that Trang must always be first and Sara must always be second. This is because the statement suggests that Sara cannot be second unless Trang is first. This means that the order of the two individuals is fixed and that Trang must always be first and Sara must always be second.
Therefore, Option A is the correct answer as Trang is always first and Sara cannot be second unless Trang is first. The other options are not true as they do not align with the given statement.