17. Which of the following sentences is grammatically INCORRECT? (A) When Thomas Jefferson, at the age of thirty-three, wrote “all men are created equal,” he and his contemporaries did not take these words literally. (B) They did not regard “men”—or as we would say today, “persons”—as equal in physical characteristics, emotional reactions, and mechanical and intellectual abilities. (C) Thomas Jefferson himself was a most remarkable person. (D) At the age of twenty-six he designed his beautiful house at Monticello, supervised its construction, and, indeed, is said to do some of the work himself.