Which sentence has a subject-verb agreement error?

What was ottaviano petrucci known for? a. he made the first violin. b. he choreographed the first ballet. c. he wrote the song greensleeves, a famous english folk song. d. he printed the first significant collection of polyphonic music.

Ais the visual display of an object meant for a computer replication. it is created using complex mathematical formulas, which creates and connects the lines, curves, and surface of the 3d object.

What modernist conventions did henry moore use in mother and child