how do you use the word "whereby"

Test Preparation
1

<p>This is a question on the CB book page 660</p>

<p>Though BEST KNOWN as a jazz vocalist, he ALSO ENJOYED gospel music, WHEREBY he told his manager that he wanted to make a RECORDING OF his favorite gospel songs. NO ERROR</p>

<p>I had a feeling the answer was "whereby", but I don't know why. What is the correct way to use that word? Thanks</p>

2

<p>whereby=as a result of
<a href="http://dictionary.reference.com/search?q=whereby%5B/url%5D%5B/color%5D"&gt;http://dictionary.reference.com/search?q=whereby&lt;/a&gt;&lt;/p>

3

<p>“Whereby” is a conjunction, which links two sentences; however, the sentence started with “though” is a subordinate clause, so the word “whereby” should be eliminated.</p>