For positive integers aaa and bbb, which is always true?
aaa divides lcm(a,b)\text{lcm}(a, b)lcm(a,b)
bbb divides lcm(a,b)\text{lcm}(a, b)lcm(a,b)
gcd(a,b)\gcd(a, b)gcd(a,b) divides lcm(a,b)\text{lcm}(a, b)lcm(a,b)
All of the above