Use the quadratic equation x2+4x+4=0 to answer the questions.

A: What is the discriminant of the quadratic equation?

B: Based on the discriminant, which statement about the roots of the quadratic equation is correct?

Select one answer for question A, and select one answer for question B.

B: There are two complex roots.
B: There are two real roots.
B: There is one real root with a multiplicity of 2.
A: −16
A: 0
A: 16