When using logic to reach your reader/audience, you are trying to get them to think - use their brain. Not their feelings, or what their opinion may be. You want to use empirical evidence or facts to state what you know. The answer choice I would choose would be answer would be A. A logically tells me that there is more out there and that the ocean floor in all has not been mapped.
Explanation:
B - this is an opinion due to the words, "it feels"
C - lends an air of mystery - still based on what I think it might look like
D - using the word clearly seems to me that they are trying to just convince you of a fact not true evidence.
Only A give the logical answer that we all <em>know</em> that all of the ocean floors have not been mapped.
“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.