Which of the following sentences is grammatically correct?
A. The student wrote too slowly to finish the exam, but he has always been a slowly writer.
B. The student wrote too slowly to finish the exam, but he has always been a slow writer.
C. The student wrote too slow to finish the exam, but he has always been a slow writer.
D. The student wrote too slow to finish the exam, but he has always been a slowly writer
In this sentence, "slow" is used correctly to describe the student's writing speed, while "slowly" is an adverb describing how the student wrote.
Therefore, the Correct Answer is B.