Final answer:
Sentence B, 'Made both of the pie crusts with lard instead of butter,' is a sentence fragment because it lacks a subject.
Step-by-step explanation:
A sentence fragment is a group of words that is missing a subject or a verb, or does not express a complete thought. In the given options, sentence B, 'Made both of the pie crusts with lard instead of butter,' is a sentence fragment because it lacks a subject. It is missing who made the pie crusts.