The letter of the sentence which shows the correct subject-verb agreement is a. Everything on this table is 50 percent off the ticketed price.
This refers to the rule of concord that states that the subject and verb in a given sentence must agree in number and degree.
Hence, we can see that from the given sentences, we can see that the correct answer that has the accurate SVA is option A because the subject and verb agree in number.
Read more about the subject-verb agreement here:
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