Riemann sum approximation answer

Question

Use the Riemann sum with $n=2$ rectangles to approximate $ \int_{0}^{1} \frac1{x^4+1} \,dx $. Round to $3$ decimal places. Options are

1. 0.867
2. 0.721
3. 0.971
4. 1.441

When I take right Riemann rectangle then the answer is 0.721 and when I take left rectangle then the answer is 0.971. When I take middle point then the answer is 0.878. So what is the answer of this question? Please help.