<p>The Ivy League was founded as a sports conference [and many think it was founded as an academic conference].</p>
<p>a. and not, as many think, as an academic conference
b. but many people think instead that it was founded as an academic conference.
c. yet many think mistakenly that it was founded as an academic conference instead.</p>
<p>Why is answer choice (A) correct but choices (B) and (C) incorrect?</p>