Answer:
A. It has a happy ending, often involving in a marriage.
Step-by-step explanation:
Shakespearean comedy plays are not what modern comedy is perceived to be. It had majorly six elements. Some elements are mistaken identity, disguise, separation between lovers, problems and conflicts between lovers mainly because of family or society, etc.
A Shakespearean play that can be defined as a comedy usually includes happy ending with marriage of lovers. One such example is 'A Midsummer Night's Dream.'
Therefore, option A is correct.