Which option was used to revise this sentence?
jenny is as stubborn as a mule, and she is still very loveable.
though jenny is as stubborn as a mule, she is still very loveable.
a.
reversed the order of subject and verb
b.
changed to a question, exclamation, or command
c.
moved parts of the sentence around
d.
added introductory words or phrases
pretty sure its d

The answer is letter D which is "added introductory word or phrases".

The word added in the second sentence is the word "though". This word is an example of a Conjunctive Adverb. These are the parts of speech used to connect one clause to another (first clause: Jenny is as stubborn as a mule; second clause: she is still very loveable). The word "though" is used to show contrast. 

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Ibelieve the correct answer is c.