Given are sets of three sentences. One, two or all the sentences may have error(s) of grammar or syntax or Standard English usage. Identify only the sentences that are incorrect
A. What I have been able to imply from this article is that mathematics is at the root of most physicalsciences.
B. Many of the most energetic students end up as under-achievers in life because of the lack offocus on their goals.
C. None of those little naughty boys have turned up today.