A) My Piano Teacher, Dr. Sisulu, is teaching me to play a Sonata by Beethoven this week.

B) My piano teacher, Dr. Sisulu, is teaching me to play a sonata by Beethoven this week.

C) My piano teacher, dr. Sisulu, is teaching me to play a sonata by beethoven this week.

D) My piano teacher, doctor Sisulu, is teaching me to play a Sonata by Beethoven this week.