Answer:
D. Using contractions or abbreviations because they are too formal and easily confused, respectively.
Explanation:
This is incorrect because contractions are too informal, rather than too formal. The latter part of the sentence is true - abbreviations can indeed be easily confused.
Contractions should always be avoided when writing a formal text such as a business proposal. Instead of writing <em>I can't, </em>you should always write <em>I cannot </em>instead of its contracted form.
Answer: B. Robinson's final few years were marked in tragedy.
Both the first and last one