Mr. Wilson has 30 students in his class. This is 12 more students than Mr. Star has. How many students does Mr. Star have? Choose the correct equation and answer. O A. X+ 12 = 30 x= 18 students O B. x + 42 = 30 x = 72 students C. x + 30 = 12 x = 42 students O D. X+ 12 = 30 x = 42 students