IN SQL

7 (consider table A and table B) Which of the following command will return a new table that has one column with 3 records? * (2 points) select studentid from A union select name from B; select A.studentid, name from A,B; select studentid from A,B; O select studentid from A union select studentid from B; select studentid from A,B where A.studentid=B.studentid