It means that it is impossible to get something for nothing, or the idea that even if something seems free, there is always a cost, no matter how indirect or hidden the cost is.
Answer:
Option C.
Explanation:
Option A is resolving the climax (decision-making).
Option B is the ending.
Option C is the climax (cause of decisions and ending).
Option D is the starting introduction.
Answer:
internal preview
Explanation:
An internal preview is a brief statement referring to a point you are going to make. It can forecast or foreshadow a main point coming in your speech.