The correct answer is B. Provide reasons
Step-by-step explanation:
In writing, especially in argumentative papers, a claim is the statement that the author of a paper aims at proving and defending during the text and that shows his position towards some issue. Because of this, deciding on a claim is one of the first steps for writing an argumentative paper, but for the claim to be valid and the argumentative text to be effective it is necessary to provide reasons and then support these reasons with evidence that can include examples, citations, facts, etc. Therefore, the next step for David is to provide reasons to support the main claim.