Question

Which of the following is a monomial A. 12c B. C^2 -16 C. c^2+c+6 D. C^3 +4c^2 -12c + 7

Answer 1

Answer is A. 12c
A monomial only consists of one term (12c), 
Binomials consist of two terms (c^2 - 16)
Trinomials consist of three terms (c^2 + c + 6)

An easy way of remembering which is which is to look at the prefixes. 
Mono= 1
Bi= 2
Tri= 3