Hospitals are useful for us because in hospitals sick people are treated.
A) Leaves out a comma before Walt (i.e. this weekend, Walt?)
B) Is not a direct sentence. The speaker is not talking to Abraham Lincoln; she/he is only talking about him.
C) Uses the comma correctly in a direct address. The speaker is saying something directly to Denise and there is a comma directly after her name.
D) Again, the speaker may not be talking directly to the boys but simply to the parents of said boys.
I hope this helps!!
Among the words listed, all of the words are spelled correctly except for the word 'inferrence'. The correct spelling for this word should only have one letter 'r'. Deterrence, reference and utterance are all correctly spelled. Inference means 'conclusion' or 'reasoning'.
The relative pronoun 'who' refers to 'people' which is a subject of this sentence, so the correct answer is C, this is also a subject.
