What is the error in 'The Ambassador's itinerary, which was classified at the Secret level and which only a handful of staff were privy to, were leaked to the press'?

What is the error in 'The Ambassador's itinerary, which was classified at the Secret level and which only a handful of staff were privy to, were leaked to the press'?

• A. The sentence should not use 'which' twice
• B. 'were privy to' should be 'was privy to'
• C. No error
• D. The sentence should be rewritten to remove the double 'which' clauses

Answer: (B)