Answer :
Answer: Option A.
Viola wants Duke Orsino to be happy.
Explanation:
Twelfth night was a romantic and story written by William Shakespeare around 1601 to 1602.
From the story, Viola separate from her twin brother Sebastian and work with Duke Orsino. She fell in love with Duke Orsino but Duke Orsino was inlove with Olivia. He sent Viola to disguise and court Olivia but Olivia fell for Viola. Later she revealed she was a girl and send Duke Orsino to her so that He will be happy.