AMC 12 2020b Problem 1

What is the value in simplest form of the following expression?$$\sqrt{1} + \sqrt{1+3} + \sqrt{1+3+5} + \sqrt{1+3+5+7}$$

$\textbf{(A) }5 \textbf{(B) }4 + \sqrt{7} + \sqrt{10} \textbf{(C) } 10 \textbf{(D) } 15 \textbf{(E) } 4 + 3\sqrt{3} + 2\sqrt{5} + \sqrt{7}$