Final answer:
The most appropriate action is gathering relevant information from the client and organizing it for the memo.
Step-by-step explanation:
The most appropriate action for the paralegal tasked with drafting the initial memo for a new client in a law firm would be option C) Gathering relevant information from the client and organizing it for the memo.
This is because before drafting the memo, it is crucial to gather all the necessary information from the client and organize it in a meaningful and coherent way. The paralegal can conduct interviews with the client, review relevant documents and evidence, and identify key facts and issues that need to be addressed in the memo. This step ensures that the memo is accurate, comprehensive, and tailored to the specific needs of the client.