The correct answer is (D) Formal ball, especially one at which debutantes are presented. Also, a lively ballroom or country dance for couples that originated in 18th century France; any of several dances that resemble the quadrille; music arranged or played for these dances.

Cotillion comes from French cotillon (petticoat).

Examples of use:

• In America, the name, quadrille, was replaced by cotillion.
• A little later, Miss Rogers and Sir James performed a cotillion.