What kind of harmony uses only notes from the key signature?

A. diminished
B. borrowed***
C. diatonic
D. dominant

In the key of D major, what chord is represented by the Roman numeral IV?

A. C minor
B. G major
C. F sharp minor
D. A major
I have no clue for the last one

please help quick

2 answers

Unit 1 Lesson 11 In Harmony quick check

1. They are all major chords
2. diatonic
3. G major

i hope this helped for anyone who still needs it <3
I can confirm, "." is correct