lighthouse is a public good O A. because there is no way to prevent those who haven't contributed to the lighthouse from seeing better because of il, but for no other reason O B. because it doesn't cost any more to light the way for 105 ships than it does to light the way for 104 ships, but for no other reason. O C. because the government produces it, and for no other reason O D. for the reasons in A and B together. O E for the reasons in A, B, and C together