A00-212 Question #31: Real Exam Question with Answer & Explanation

Given the SAS date sets CLASS1 and CLASS2: CLASS1 CLASS2 NAME COURSE NAME COURSE ------- ----------- ------- ------------ Lauren MATH1 Smith MATH2 Patel MATH1 Farmer MATH2 Chang MATH1 Patel MATH2 Chang MATH3 Hillier MATH2 The following SAS program is submitted: proc sql; select name from CLASS1 <insert SQL set operator here> select name from CLASS2; quit; The following output is desired: NAME --------- Chang Chang Lauren Which SQL set operator completes the program and generates the desired output?