执行下面Python代码后，输出的结果可能是？（ ）
name = ('Tom', 'Join', 'Gaia')
age = (10, 13, 12)
print({(a.upper(), b) for a, b in zip(name, age)})
{'Tom': 10, 'Join': 13, 'Gaia': 12}
{'TOM': 10, 'JOIN': 13, 'GAIA': 12}
{('JOIN', 13), ('TOM', 10), ('GAIA', 12)}
{('Join', 13), ('Tom', 10), ('Gaia', 12)}