Based on the information regarding the subject-verb agreement, the correct option will be "The age of Old Ship Church, the oldest church in continuous use in the United States, pales in comparison to that of many European structures.
Subject-verb agreement.
It should be noted that when the subject of the sentence is singular, then the verb must be singular as well.
In this case, the subject is singular, therefore the verb will be singular. Therefore, the correct sentence will be "The age of Old Ship Church, the oldest church in continuous use in the United States, pales in comparison to that of many European structures".
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