A factory annually produced the following units in four quarters:
$$\text{Q1}:1500,\text{Q2}:2500,\text{Q3}:2000,\text{Q4}:4000$$

What fraction of the total annual production was produced in $\text{Q2}$?

1. A
   $\frac{1}{5}$
2. B
   $\frac{1}{4}$
3. C
   $\frac{1}{3}$
4. D
   $\frac{2}{5}$