Greatest Confusion!

Algebra Level 3

$\begin{aligned} A &=& \sqrt 8 + \sqrt{22} \\ B &=& \sqrt 1 + \sqrt{29} \\ C &=& \sqrt{12} + \sqrt{18} \\ D &=& \sqrt{10} + \sqrt{20} \end{aligned}$

Using the above information, which of these numbers is the largest in value?