Final answer:
Max Steiner composed over 300 film scores, including for classic movies like Gone with the Wind and Casablanca.
Step-by-step explanation:
Max Steiner, a prolific composer in the history of film music, wrote a substantial number of film scores during his career. The correct answer to how many film scores Max Steiner composed is: B. Over 300. Steiner was a pioneer in the field of film music and his work includes the scores for classic films such as Gone with the Wind, Casablanca, and King Kong. His contribution to the art of cinema is immense, and his music continues to influence composers today.