Final answer:
The sentence provided is not a fragment but a complete sentence that includes both a subject and a predicate, making it a properly constructed sentence.
Step-by-step explanation:
The sentence 'As odd as it might seem, the Guadalupe Mountains National Park in Texas offers one of the finest examples of an ancient marine reef.' is not a sentence fragment. The sentence provided is not a fragment but a complete sentence that includes both a subject and a predicate, making it a properly constructed sentence.
It is a complete sentence with a clear subject ('the Guadalupe Mountains National Park in Texas') and predicate ('offers one of the finest examples of an ancient marine reef'). The clause beginning with 'as odd as it might seem' is a subordinate clause that sets the stage for the main clause but does not stand alone. Thus, the correct answer is b) No, it's a complete sentence.