Solve the inequality. Write the solution set in interval notation.
(7x - 9)(5x - 9) < 0
Select one:
a. [$\frac{9}{7}$, $\frac{9}{5}$]
b. (-?, $\frac{9}{7}$) U [$ \frac{9}{5}$, ?)
c. ($\frac{9}{7}$, $\frac{9}{5}$)
d. (-?, $\frac{9}{7}$) U ($\frac{9}{5}$, ?)