Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to handle a bomb threat over the telephone [title] Take a deep breath. [step] Try to remain calm. The calmer you are, the better you will be able to think on your feet.

Ending1: If you are not calm you could come across as an angry or tense person. It is strongly advised that you do not react aggressively to the bomb threat unless you absolutely have to. Ending2: [substeps] If you are on an emergency call, you need to be able to deal with the situation promptly because time is of the essence. Assume that, even if you need to call another person, you will be called. Ending3: If a bomb threatens to detonate, you will be in serious trouble. [substeps] Go to the top story of your home. Ending4: [substeps] Deep breaths should come from your diaphragm. Place a hand on your stomach and feel it expand when you breathe in and contract when you breathe out.

Answer format: ending1/ending2/ending3/ending4