During the heyday of the big Hollywood studios, which one of these actors was most likely to get top billing on a film?

What is the musical significance of the MGM film Forbidden Planet?

a) it was one of the first commercial films with a completely electronic soundtrack b) it was one of the first commercial films to feature acoustic folk music in its soundtrack c) it was one of the first commercial films to employ a theremin d) it was one of the first commercial films to feature aleatory music by John Cage

The harmonic idiom of this excerpt can best be characterized as moving between?

a) tonality and atonality b) tonality and modality c) polytonal and chromaticism d) serialism and atonality