Consider the following statements regarding the 'Company-Nawab' tensions in Bengal: 1. Alivardi Khan had warned that the British were like 'bees'—if left alone they would provide honey (trade), but if disturbed, they would sting. 2. Siraj-ud-Daula attacked Calcutta because the British refused to stop fortifying the city. 3. The Black Hole Tragedy was the primary trigger for the Battle of Plassey. Which are correct?