Answer : D. a little.
Explanation :Hope this helps!
A writer should hyphenate a compound modifier that comes before the noun it modifies.
Take a look at this example:
No one likes a <em>two-faced </em>person.
As you can see, the modifier <em>two-faced </em>is hyphenated, first of all because it is compound (meaning that it has more than one word), and second of all because it comes before the noun <em>person </em>which it modifies.
C., is the best answer. I should know i had a test on this, hope it helps. Ask your teacher when you go to school. Xo-Taviera.