A. doesn't fix it. It just adds a comma splice. But the thoughts are not made clear, and are still hard to understand.
You can fix a run-on by adding a semi-colon in the two independent sentences, like in d, separating the sentences to two individual sentences, like in c, and you can add a comma and coordinating conjunction like in b. Know this and you should be able to master run-on sentences.
Answer:
Dyslexia is a language-based learning disability. Dyslexia refers to a cluster of symptoms, which result in people having difficulties with specific language skills, particularly reading.
Explanation:
Students with dyslexia usually experience difficulties with other language skills such as spelling, writing, and pronouncing words. your welcome.
Part a is C because the other ones did not make sense