The following (simple structure sentences) are to express the same meaning. Which is/are grammatically correct? 1. It was the year Britain declared war on Germany. 2. It was the year Britain declared a war on Germany. 3. It was the year Britain declared the war on Germany. 4. It was the year when Britain declared war on Germany. 5. It was the year that Britain declared war on Germany. 6. It was the year and Britain declared war on Germany in that year. 7. It was the year, Britain declared war on Germany that year. 8. It was the year and Britain declared war on Germany.