Identify the relationship that must hold if LCM(a,b)=GCD(a,b)\text{LCM}(a, b) = \text{GCD}(a, b)LCM(a,b)=GCD(a,b) for positive integers aaa and bbb.
a>ba > ba>b
a=ba = ba=b
aaa is a multiple of bbb
a+b=0a + b = 0a+b=0