Which of these is a compound sentence? Immigrants who came to work in factories lived in urban neighborhoods.
"Old" immigrants often settled on farms, but most "new" ones lived in cities.
In the past, many immigrants had come from Northern and Western Europe.
Immigrants working long hours and facing crowded living conditions.

"Old" immigrants often settled on farms, but most "new" ones lived in cities.

Explanation:

"Old" immigrants often settled on farms, but most "new" ones lived in cities.

first half

second half

these parts of the sentence can "stand alone," therefore making this a compound sentence

answer; i believe that the correct answer is (tobacco);

idk lol i just wanna finish mines