is this a sentence fragment? as odd as it might seem, the guadalupe mountains national park in texas offers…

is this a sentence fragment? as odd as it might seem, the guadalupe mountains national park in texas offers one of the finest examples of an ancient marine reef. yes no
Answer
Brief Explanations:
A complete sentence has a subject ("the Guadalupe Mountains National Park in Texas") and a predicate ("offers one of the finest examples of an ancient marine reef") and expresses a complete thought. This is a complete sentence.
Answer:
B. no