The answer is D: The band trip is almost full, so if the color guard members want to go, they will need to sign up soon.
Their is no man in the bake sale sentence. Hence, him. Same for the other sentences.
They have the same endings except in the nosotros and vosotros forms.
I have been a wretched person, but I have redeemed myself.
And
So with that, I am grateful