Katie simplified the expression (x+b) (x+c), where b < 0 and c < 0, to the form

[Unknown Prophet.]

x² + gx + k. What...? Must be true about g and k?

A. g < 0 and k > 0
B. g < 0 and k < 0
C. g > 0 and k > 0
D. g > 0 and k < 0
Thank you!