Final answer:
The sentence should have commas after 'Germans' and 'audience'
Step-by-step explanation:
The correct change that should be made to the sentence is option A. Insert commas after Germans and audience.
The sentence is talking about the Germans in the audience, so it is necessary to include commas to set off this information as nonessential. The correct sentence would be: 'The Germans in the audience appreciated President Kennedy's support, and cheered his message of freedom enthusiastically.'
Learn more about Punctuation in English sentences