What letter note is this?

Ablank is a type of chord that consists of three pitches on consecutive lines or spacesa. monophonyb. chordc. triadd. natural

Which statement is true with regard to beethoven? a. ludwig vin kochel catalogued more than six hundred of his compositions. b. he was the official composer for the powerful and rich eszterhazy family. c. he produced the best piano sonatas and the “ninth symphony” after losing his hearing. d. he wrote the well-known opera “the magic flute” during the last years of his life.

In the artwork "that gentleman" by andrew wyeth what colors are present in the painting?