Grammar question

<p>In believing that firsthand experience would add to the credibility of her biography of Matthew Henson, a discoverer of the North Pole, the author spent a winter north of the Arctic Circle.</p>

<p>A. In believing that
B. Believing that
C. Because believing that
D. She believed that
E. Since having believed that</p>

<p>What's the difference between choice A and B?</p>

<p>The correct answer is B. The phrase in A might be used as follows:</p>

<p>In believing that her book would be widely popular, she was mistaken.</p>

<p>Try reversing the order.</p>

<p>The author spent a winter believing that…
or
The author spent a winter in believing that…</p>

<p>The former makes more sense.</p>