Question: The Whisk is a dance step used in what genre of ballroom dance? 
Context: Yvonne Marceau is an American ballroom dancer, choreographer, and instructor.  She was born in Chicago, IL, and holds a B.F.A. from the University of Utah as well as an associate degree from the Imperial Society of Ballroom Dance.  In 1984, Marceau co-founded American Ballroom Theater with her dance partner, Pierre Dulaine.  Together, Marceau and Dulaine won numerous ballroom dance contests and were four-time winners of the British Exhibition ballroom competition.  Marceau is the recipient of various awards, including the Astaire Award and the Dance Magazine Award.  Along with Dulaine, Marceau co-founded the Ballroom Theater’s Dancing Classrooms program, which is featured in the documentary Mad Hot Ballroom.  Marceau has been on the faculty at The Juilliard School since 1993 and has taught at the School of American Ballet as well as for numerous New York City social groups, including the Union Club and cotillion societies.  Marceau also currently teaches at the NYU Tisch New Studio on Broadway. The Telemark is a silver level waltz ballroom dance step.  Telemarks are reverse turns where the follower does a heel turn as the leader travels around her.  There are similar Telemarks in Foxtrot and Quickstep. The impetus is a ballroom dance step used in the Waltz, FoxTrot or Quickstep.  The open impetus is one of several ways to get into promenade position and is used to turn dancers around corners or change their direction on the dance floor.  It is often performed after a natural turn. The natural spin turn is a ballroom dance step used in the Waltz.  It is typically used to advance a couple 7/8ths of a turn down line of dance, although an underturned spin turn is also very useful for turning a corner.  The natural spin turn is also considered an intermediary step toward learning pivots. Viennese Waltz (German: "Wiener Walzer" ) is the genre of a ballroom dance.  At least three different meanings are recognized.  In the historically first sense, the name may refer to several versions of the waltz, including the earliest waltzes done in ballroom dancing, danced to the music of Viennese Waltz. The whisk is a ballroom dance step used in the Waltz or Viennese Waltz.  It is one of several ways to get into promenade position and is used to turn dancers around corners or change their direction on the dance floor.  It is often performed after a complete reverse turn. Box Step is a basic dance step named after the pattern it creates on the floor, which is that of a square or box.  It is used in a number of American Style ballroom dances: rumba, waltz, bronze-level foxtrot.  While it can be performed individually, it is usually done with a partner.  This is the most common dance step in the waltz.  In International Standard there is a similar step called Closed Change. Chasse ] or chassé ] (French for "to chase") is a dance step used in many dances in many variations.  All variations are triple-step patterns of gliding character in a "step-together-step" pattern.  The word came from ballet terminology. Melanie LaPatin is a United States Professional Ballroom Dance Champion and world-renowned choreographer, best known for her choreography work on Fox's "So You Think You Can Dance" and ABC's "Dancing With the Stars."  Originally from Brooklyn, New York, LaPatin formed a professional partnership with Tony Meredith in 1981, marrying him in 1989.  Together they traveled the world, competing, coaching, performing, lecturing, choreographing, and represented the United States in twelve Professional World Latin-American Dance Championships, winning over 100 championship titles.  LaPatin eventually moved to back to New York to coach and open a Latin and Ballroom dance studio, Dance Times Square. The minuet step is the dance step performed in the dance minuet.  It "is composed of four plain straight Steps or Walks, and may be performed forwards, backward, sideways, &c." or in a square.  The steps are often referred to by direction to distinguish them.  "A Movement, or Sink and Rise, being added to the first Step of the three belonging to the Minuet Step, produces a Bouree; and the like to the fourth and last a Half Coupee, which together compose what is commonly called the English Minuet Step" .
Answer: Viennese Waltz