Which set of numbers is ordered from least to greatest?
a.
{0.4, 2.3, –1.1, –2, –3.1}
b.
{2.3, 0.4, –1.1, –2, –3.1}
c.
{–3.1, –2, –1.1, 0.4, 2.3}
d.
{–3.1, –2, –1.1, 2.3, 0.4}