One point perspective is a type of linear perspective. Linear perspective relies on the use of lines to render objects leading to the illusion of space and form in a flat work of art. It is a structured approach to drawing. One point perspective gets its name from the fact that it utilizes a single vanishing point.
The answer would be D. nonet. nonet-nine-et
An octet is 8
duet is 2
and a quartet is 4
All printing is true
Or if you mean handwriting
All printing is legible