What is the inverse of the following statement?
If angle ABC is equilateral, then it is isosceles.
A) If angle ABC is equilateral, then it is isosceles.
B) If angle ABC is isosceles, then it is equilateral.
C) If angle ABC is not isosceles, then it is not equilateral.
D) If angle ABC is not equilateral, then it is isosceles.