An astronaut is a person who travels through space in a _____. A: warship B: airship C: steamship D: spaceship

Your choice _____ A: Employment in the fishing and whaling industries. B: Nineteenth century sea captains. C: The economic importance of sailing ships D: The development of the steamship

According to the author, in which decade of the nineteenth century did a steamship first attempt to compete with the transatlantic packets A: The twenties. B: The thirties. C: The forties. D: The fifties.