The correct option is this: THEY ALL HAVE RATHER DIFFERENT PERSONALITIES.
This question was drawn from the chapter ten of the book 'The Rainbow' by D.H. Lawrence.
The first five paragraphs of the book described the relationship among the sisters, the school they attend and the friends they keep. The paragraphs also discuss the different temperaments that each of the sisters have; the three of them have different personalities.
In the sentence, <em>My new alarm clock was much louder than my old one, </em>the word that is an example of comparative degree adjective is louder. The comparative degree adjective shows that there are two objects that are in comparison while the superlative is when there are three or more items being compared.
I just learned prep. phrases like 3 months ago but i think it is B.
