Which of these is a complex 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.

(Estoy bastante seguro de que la respuesta es una)                                                he or she said it might be A

the option which was not a function of missionaries in the northwest was the first one - they established posts for trading furs and other goods.

missionaries were sent around the world to spread religion and their knowledge and others - they were not merchants who sold furs and other goods.

nations must cooperate to bring about and maintain world peace.

nations must not wage wars or commit war crimes in a desire to control other nations.

i think i know which options you have but if these aren't options let me know