Architect and know as a modern engineer <span />
Answer:
D
Explanation:
The subject is plural, and I don't know how to explain this correctly, but I think that's the answer because it makes the verb singular.
??????????????? I don’t understand
C-C♯/D♭-D -D♯/E♭-E - F -F♯/G♭-G- G♯/A♭-A -A♯/B♭-B- C