Answer:
When solving for p in the equation -9 + p < 15, we need to isolate p on one side of the equation.
To do this, we first subtract -9 from both sides of the equation:
-9 + p - (-9) < 15 - (-9)
Then, we have:
p < 15 + 9
Simplifying further, we get:
p < 24
Therefore, the correct answer is option C.
p < 24