The correct option is D 3
The highest of the degrees of all the terms of an expression is called the degree of the expression.
p3−3p2+3
The degree of the term p3 is 3.
The degree of the term −3p2 is 2.
The degree of the term 3=3p0 is 0.
Hence, the highest degree of the expression (p3−3p2+3) is 3.