14. Which of these is equal to $\frac{10}{9}+\frac{9}{10}$ ?
A 1
B 2
C $2.0 \mathrm{i}$
D $2 . \dot{1}$
E $2 . \dot{2}$
14. C $\frac{10}{9}+\frac{9}{10}=\frac{100+81}{90}=\frac{181}{90}=2+\frac{1}{90}=2.0 \dot{1}$.