You will be given a definition of a task first, then some input of the task.
In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".

[header] How to do clan wars on clash of clans [title] Start a clan war. [step] If you're just a member of clan, ask in your clan chat for a leader or co-leader to start a clan war. [substeps] If you don't know any staff in your clan, click on view clan and browse through a list of your clanmates. <sep> (A) Below their username and stats, you will see their permissions. Keep in mind that in mind that you need at least ten active players in your clan to declare war. (B) When you've found someone you think you can befriend, click on their server and then click' friend'. If you want someone else to join your clan, it will say' do this for you. (C) Click on your friend to select him or her and then go to member tab [substeps] Click advance clan button or alt to inform the moderator. State if there are any regional leaders that you'd like to invite to this sort of war of clans. (D) Look at clans that have a leader or co-leader, then look at your current clan. Make sure you have the affiliation for your clan to ensure everything stays the same.
Output:
A