What is the numerical coefficient of the expression -(m^2 p)/5? 

A. 1/5
B. 5
C. -1/5
D. -5 22

Which of the following monomials has the highest degree? 

A. -9x^8
B. (3 〖(xy)〗^2)/5
C. (8)(3)〖xyz〗^3
D. 〖 〖6 x〗^4 y〗^5

23. How many terms does the expression 3m - 5mn + 2m^2 has? 
A. 1
B. 2
C. 3
D. 4 ​