Which of the following changes might arise if a group of people were isolated from other speakers of the same language?
dialogue
dialect
acquisition

"acquisition- 2#: the learning or developing of a skill, habit, or quality
dialect- a particular form of language that is peculiar to a specific, region, or social group"

im not sure on this one but I dont think its dialouge. I dont want to give you an exact answer and it end up being wrong and that won't help so here are the definitions of the last two.

I hope it helps a little ^-^
sorry for not giving a exact answer

Lorna would be the complete subject in this sentence.