Complete the sentence: Nothing seemed very inspiring _____ then she heard a song called 'Simply the best'.

• A. And
• B. But
• C. Or
• D. So

Answer: (A)

The concept here is linking two actions in a sequence. Nothing seemed very inspiring is the first action, and then she heard a song marks what happened next. Using and to join the clauses creates a smooth, additive connection that simply adds the second event to the first without implying a contrast or consequence. So the natural flow is: Nothing seemed very inspiring and then she heard a song called 'Simply the best'.

Using but would introduce a sense of contrast or a turn (“something happened after that changes things”), or so would signal a consequence, which changes the nuance. Or would present an alternative, which doesn’t fit the way the sentence unfolds in time.