music: 70's Chart Toppers: Name The Artist: Rhinestone Cowboy?

Questions

What vitamin is most commonly added to milk, because it is not found in milk naturally?

What vitamin is sometimes called the 'sunshine vitamin?

What kind of clay can potters heat to a higher temperature earthenware or stoneware?

What kind of tradesman uses a 'plunger?

What language does 'danke' mean 'thank you'?