On the rough draft of her essay, Anna wrote:
Columbus found valuable resources in the New World, many explorers came to the area after him.
What common mistake did Anna make when writing this run-on sentence?
Select one:
She arranged the dependent clause in front of the comma and the independent clause.
She joined two independent clauses with only a comma.
She used a confusing pronoun that had no antecedent.
She used verbs that do not agree in verb tense.