Read the following sentence and decide whether the underlined portion contains a mistake. If so, identify the best way to correct or improve the sentence by choosing the appropriate suggestion from the answer choices. If the underlined portion requires no improvement or correction, choose No improvement or correction is required. Mr. Donovan gives a large contribution to an agency that was collecting funds for malaria prevention in Africa. O gave a large contribution to an agency that were collecting funds O were giving a large contribution to an agency that were collecting funds O gave a large contribution to an agency that are collecting funds O gave a large contribution to an agency that was collecting funds No improvement or correction is required