Answer:
A
Step-by-step explanation:
Equation A is true for all real numbers. It says the quantity b + 2 is equal to itself!
Equation B, solved for b, gives b = 1, so the equation is true only for b = 1.
Equation C, solved for b, gives 2 = -2, which is absolutely false, so the equation has no solutions.
Equation D, solved for b, gives b = 1, so only one solution
