The problem is $$\frac{5}{6} + \frac{2}{3}$$
I found the LCD which is $6$. Then I multiplied $2\times 3=6$ and $2\times 2=4$. So the new problem is $$\frac{5}{6} + \frac{4}{6} = \frac{11}{6}$$ $\frac{11}{6}$ simplified is $1 \frac{5}{6}$ but that's not an answer I can select.