fill up all the available choices cuz if u dont get anything within what u've filled, u'll not be offered anything. So better to fill up as many options as possible. There's no restriction on that.
I am only one,
But still I am one.
I cannot do everything,
But still I can do something;
And because I cannot do everything
I will not refuse to do the something that I can do.
- Edward Everett Hale