Final answer:
To correct the subject-verb agreement error in the sentence, change "runs" to "run" to match the plural subject "The two speakers." The correct answer is option A.
Step-by-step explanation:
The sentence in question contains a subject-verb agreement error with the compound subject "The two speakers" and the verb "runs." To ensure proper agreement, the verb "runs" should be changed to its plural form "run" to match the plural subject. Therefore, the correct option for making the subjects and verbs agree is A. "runs" to "run".
Subject-verb agreement requires verbs to match their subjects in number, meaning that if a subject is singular, the verb must also be singular, and if a subject is plural, the verb must be plural. Compound subjects joined by 'and' usually take a plural verb, as seen in examples like "Yoga and meditation are effective activities for relieving stress." However, it is important to be aware of exceptions, such as when the compound subject forms a single idea or when subjects are joined by 'or' or 'nor.'