Which of the following are equivalent (i.e., would do the same thing in SQL)?

• A. fname LIKE 'J%' vs. fname = 'J*'
• B. WHERE position = 'manager' OR position = 'trainee' vs. WHERE position IN ('manager', 'trainee')
• C ORDER BY age vs. ORDER BY age ASC
• D. IS NOT NULL vs. != ''
• A & B
• A & D
• B & C
• B, C, & D
• All are equivalent