help/or if you can give me the links to help

<h1>10, pg 723</h1>

<p>I put B, but I don't understand why A would be a better choice.</p>

<h1>29, pg 725.</h1>

<p>Today a medical doctor must often make a choice between engaging in private practice (or) engaging in research.</p>

<p>Parenthesis part is wrong. Why?</p>

<h1>13, pg 814.</h1>

<p>What is the difference between choice D and B?</p>

<p>Thanks!!!</p>

<p>sorry, i forgot to say these questions are from the bluebook</p>

<p>I don't have my Blue Book right here with me, so I will just answer the middle question.</p>

<p>The or is incorrect because the correct prase would be "between this AND that." You cannot say "between this OR that." It is not correct.</p>

<p>bumpbumpbump</p>