Miku miku you can call me miku blue hair blue eye hiding in your wifi

7. what should happen during the middle of your narrative?

Silverpoint is a. a technique using the blackish residue of impure carbon obtained by removing water from animal and vegetation substances. b. a technique involving the use of a metal point, and a thin silver wire, popular in the 14th and 15th centuries. c. a printmaking technique born from crayon manner that imitates the appearance of chalk lines. d. a technique used since the 16th century involving a stick filled with either colored or black graphite, a heated mixture of carbon and clay

According to the hierarchy of chords, fill in the missing chord in this progression. i - iv - - i?