Which of the following punctuation most easily loses its effectiveness if overused? question mark
exclamation point
period

Lets look:

Hi. My name is Laurel.

Not the period

Hi? My name is Laurel?

This doesn't work in this sentence, but its not the question mark.

Hi! My name is Laurel!

It is the exclamation point because if you show too much excitement it will take away from  your main point.

Explanation:

it could change in many ways and by that i mean income can go lower or higher depending on how hard you work. i hope this .

b is the correct answer