Answer:
She is not writing a letter.
The English language has a variety of many grammatical inferences mainly because our language is more complex and is used as a national language. Such a selection of words, spellings etc are used so many can refer to a situation with grammar they can understand.
D: summarizes the significance
Formal i think or uplifting........
Cause is when you are the one who started it. Contribute is when you help with something.
You could have just looked it up