Think A is correct. It references Mr. Sparks expertise which lends credence to his subsequent description. Additionally, since the description is in his words, they are surrounded by quotation marks citing to all readers he should get credit for being used in 3rd party research.
Option A: Bird expert Lee Sparks describes Harpy Eagles as "oddly attractive yet insanely dangerous predators."
Explanation:
A signal phrase is a sentence that begins with the author's name. It is also characterized by an action verb. The action verb introduces the action taken by the character. For example, the sentence:
<em>Bird expert Lee Sparks</em> describes Harpy Eagles as "oddly attractive yet insanely dangerous predators."
The author is Lee Sparks. The action verb "describes" introduces the content. This makes the reading to be interesting.
