The first aircraft were small, noisy __ very uncomfortable.

The first aircraft were small, noisy __ very uncomfortable.

• A. And
• B. But
• C. Or
• D. So

Answer: (A)

The sentence is listing several qualities of the aircraft, so it needs a coordinating conjunction to join the items in the description. And is the natural choice here because it simply adds the final characteristic to the list: the aircraft were small, noisy and very uncomfortable. Using but would suggest a contrast (these were small and noisy, but not very uncomfortable), or so would imply a consequence, which doesn’t fit the way the sentence describes the qualities. Or would present alternatives, which isn’t what’s being conveyed. So the conjunction that keeps the description flowing as a straightforward list is and.

The sentence is listing several qualities of the aircraft, so it needs a coordinating conjunction to join the items in the description. And is the natural choice here because it simply adds the final characteristic to the list: the aircraft were small, noisy and very uncomfortable. Using but would suggest a contrast (these were small and noisy, but not very uncomfortable), or so would imply a consequence, which doesn’t fit the way the sentence describes the qualities. Or would present alternatives, which isn’t what’s being conveyed. So the conjunction that keeps the description flowing as a straightforward list is and.