[单项选择] The three main types of secondary education in the United States have been provided by the Latin grammar school, the academy, and the public high school. The first of these was a colonial institution. It began in New England with the establish ment in 1635 of the Boston Free Latin School. The curriculum (课程) consisted mainly of the classical languages, and the purpose of this kind of school was the preparation of boys for college, where most of them would be fitted for the ministry. The academy began in the early 1750’’s with Benjamin Franklin’’s school in Philadelphia, which later became the University of Pennsylvania. It extended generally to about the middle nineteenth century, except in the southern states where the public high school was late in developing and where the academy continued to be a principal means of secondary education even after 1900. The academy was open to girls as well as to boys, and it provided a wider curriculum than what the Latin grammar school had
A. enactment of the first state-wide public high-school law
B. founding of the Latin Grammar School in Boston
C. establishment of the English classical School in Boston
D. year when Massachusetts made free public education compulsory after the eighth grade