Elizabeth Bishop, (born Feb. 8, 1911, Worcester, Mass., U.S.—died Oct. 6, 1979, Boston, Mass.), American poet known for her polished, witty, descriptive verse. Her short stories and her poetry first were published in The New Yorker and other magazines.
Answer:
“I took the subway, but there was a delay.”
Because a comma is used to separate two meanings without using and