Final answer:
Option 2 is correct: After living in Oak Ridge, Missouri all her life, Cornelia was excited about her trip to Prague.
Step-by-step explanation:
Option 2 is correct: After living in Oak Ridge, Missouri all her life, Cornelia was excited about her trip to Prague.
The comma after 'Missouri' in option 2 indicates a non-restrictive clause, which provides additional information about the subject without changing the meaning of the sentence. This means that the information about living in Oak Ridge, Missouri is not essential to the meaning of the sentence and can be removed without altering the main idea.
In option 1, there is no comma after 'Missouri', indicating a restrictive clause. This implies that the information about living in Oak Ridge, Missouri is necessary to identify which Cornelia is being referred to.