Final answer:
The major key that has the same number of flats as C minor is Db major.
Step-by-step explanation:
The correct answer is c. db major. C minor, which is a minor key, has 3 flats: Bb, Eb, and Ab.
The same number of sharps is found in the relative major key of C minor, which is Eb major. However, none of the answer options have the same number of sharps and flats as C minor.
Db major, on the other hand, has the same number of flats as C minor. Db major has 5 flats: Bb, Eb, Ab, Db, and Gb. Therefore, the correct answer is c. db major.