Final answer:
The dance style described, with a broad movement vocabulary and a flexible approach to positions, is Contemporary dance.
Step-by-step explanation:
The style of dance described in the question, characterized by a broader vocabulary of movement, legs that may not always turn out, a flexible spine, use of low-level movement, and the absence of a limitation to classical positions and steps, is Contemporary dance.
Unlike Ballet, which has a very formal and codified repertoire of movements, or Ballroom, which is usually based on set patterns of dance with a partner, Contemporary dance allows for more artistic freedom, innovation, and a blend of different dance styles. Jazz, while also having a broad movement vocabulary, generally keeps to higher energy levels and includes stylistic references to various American dance traditions.
The style of dance that has a broader vocabulary of movement, with legs that may or may not turn out, a flexible spine, more use of low-level movement, and is not limited to classical positions and steps is Contemporary dance. Contemporary dance is a genre that combines elements of modern, jazz, ballet, and other styles.
It emphasizes fluidity, versatility, and expression, allowing dancers to explore a wide range of movement possibilities.
Therefore answer is C) Contemporary.