A historic composer for Western music, Mozart’s Serenade No.13 is to the classical period what Vivaldi’s The Four Seasons is to the Italian Baroque period.
Since A historic composer for Western music is acting as a modifier, the word next to this modifier shall tell who is a historic composer for Western music, therefore A,B , and C are out
A. Mozart’s Serenade No.13 is to the classical period what
B. Mozart’s Serenade No.13 is to the classical period like
C. Mozart’s Serenade No.13 is to the classical period just as
D. Mozart wrote Serenade No.13 that is to the classical period similar to
E. Mozart wrote Serenade No.13 that is to the classical period what
Between options D and E, correct usage is A is to B what C is to D and that structure is found in option E, therefore E is the correct Answer