Help with these Writing questions

Test Preparation
1

<p>I'm confounded by these 4 questions (Remove the spaces to see the questions - I don't know why this site blocks the links):</p>

<p><a href="http://i.imgur"&gt;http://i.imgur&lt;/a>. com/OAFQM3u.png
My answer: A
Right answer: B</p>

<p>What is wrong with A? Is "if put" ambiguous? </p>

<p><a href="http://i.imgur"&gt;http://i.imgur&lt;/a>. com/E9S0Kat.png
My answer: B
Right answer: E</p>

<p>Shouldn't it be "but it was not until"? Isn't "but not until" incorrectly used here?
<a href="http://i.imgur"&gt;http://i.imgur&lt;/a>. com/dOrS1Yw.png
My answer: C
Right answer: B</p>

<p><a href="http://i.imgur"&gt;http://i.imgur&lt;/a>. com/ZnPynIz.png
My answer: B
Right answer: A</p>

<p>Looking at it, I understand why A is the right answer, but I'm also confused by a couple of things. Is "Freedom of action and expression" supposed to be one entity or is it freedom of action and freedom of expression? And B seems very conspicuously awkward but it seems to be correct here, so explain why it's not necessary to change it to "of not only". </p>

2

<ol>
<li><p>A means a majority of the property owners would be put to a vote–it must specify that it’s the proposal that would be voted on.</p></li>
<li><p>“Not until A did B” is idiomatically fine.</p></li>
<li><p>It’s “freedom (of action and expression),” so the subject is “freedom.” The plural would have to treat freedom of action as one thing and “expression” (sans freedom) as a separate thing. Just as importantly, though, (B) is fine–it sets up a perfectly cromulent parallel structure.</p></li>
</ol>

3

<p>Thanks^</p>

<p>Forgot to ask about the 3rd question: Why isn’t C ambiguous since “they” could be referring to both signals and plants? And since B is wrong what should it be changed to?</p>