Answer:
<h2>cu = control unit</h2>
~ƒöᏝϗʆѻʁᶥąռ¹₃
“Students attending school with mandatory uniform policies experience less pressure than do students who must choose their wardrobes”. Right from that you can see that the authors position is that he/she doesn’t agree with the fact that students should have uniforms.
The only sentence which is not a proposition is Sit down, because this is imperative, you are ordering somebody to do something, whereas propositions merely inform.
