If A={x∣x is a prime number<10}A = \{x \mid x \text{ is a prime number} < 10\}A={x∣x is a prime number<10}, what is AAA?
{1,3,5,7}\{1, 3, 5, 7\}{1,3,5,7}
{2,3,5,7}\{2, 3, 5, 7\}{2,3,5,7}
{2,4,6,8}\{2, 4, 6, 8\}{2,4,6,8}
{3,5,7,9}\{3, 5, 7, 9\}{3,5,7,9}