Answer:
Option D is correct :
Step-by-step explanation:
Rina taller than Ryan by [tex]x + \frac{1}{4} [/tex].
[tex](6x + \frac{3}{8} ) - (5x + \frac{1}{8} )[/tex]
[tex]6x + \frac{3}{8} - (5x) - \frac{1}{8} [/tex]
[tex]6x - 5x + \frac{3 - 1}{8} [/tex]
[tex]6x - 5x + \frac{2}{8} [/tex]
[tex]6x - 5x + \frac{1}{4} [/tex]
[tex]x + \frac{1}{4} [/tex]
Hope it is helpful......