Simplify : $\large\frac{21t+5+4t^2}{5t+25}$

Question

$\begin{array}{1 1} (a)\;\frac{1}{5}(4t+1)\\ (b)\;\frac{1}{6}(4t+1) \\ (c)\;\frac{-1}{5}(4t+1) \\(d)\;5(4t+1)\end{array} $