If a three-stage amplifier has individual stage gains of 10 db, 5 db and 12 db, then total gain in db is____________?

If a three-stage amplifier has individual stage gains of 10 db, 5 db and 12 db, then total gain in db is____________?

A. 600 db
B. 24 db
C. 14 db
D. 27 db