If A={1,2,3}A = \{1, 2, 3\}A={1,2,3} and B={3,4,5}B = \{3, 4, 5\}B={3,4,5}, what is A∪BA \cup BA∪B?
{3}\{3\}{3}
{1,2,3,4,5}\{1, 2, 3, 4, 5\}{1,2,3,4,5}
{1,2,4,5}\{1, 2, 4, 5\}{1,2,4,5}
{1,2,3}\{1, 2, 3\}{1,2,3}