Nam had just booked a ticket for his favorite singer’s concert. He realised that it had been called off for no obvious reasons.

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following question

Question:

Nam had just booked a ticket for his favorite singer’s concert. He realised that it had been called off for no obvious reasons.

• A.
  Scarcely had Nam booked a ticket for his favorite singer’s concert when he didn’t realise it had been postponed for no obvious reasons.
• B.
  Scarcely had Nam booked a ticket for his favorite singer’s concert when he realised that it had been postponed for no obvious reasons.
• C.
  Scarcely had Nam booked a ticket for his favorite singer’s concert when he didn’t realise it had been canceled for no obvious reasons.
• D.
  Scarcely had Nam booked a ticket for his favorite singer’s concert when he realised that it had been canceled for no obvious reasons.