Please check my answers, if I have a wrong answer please tell me what the correct answer is
1. The ____ triad is built on the second scale degree.
a. mediant
b. submediant (my answer)
c. supertonic
d. leading-tone
2. In a major key, the minor diatonic triads are
a. mediant, dominant, and submediant (my answer)
b. subdominant, dominant, and tonic
c. supertonic, subdominant, and dominant
d. supertonic, mediant, and submediant
3. In the key of C, the D-major chord is the
a. tonic (my answer)
b. subdominant
c. mediant
d. supertonic
4. The _____ is the most stable-sounding diatonic triad.
a. tonic
b. subdominant (my answer)
c. mediant
d. supertonic
5. The _____ sounds unstable because it is diminished.
a. supertonic (my answer)
b. subdominant
c. leading tone
d. submediant