How to create carbon copy recipents (cc) in Action Mailer for rails version 2.3.8

My application is devloped in rails -2.3.8

i able to send mail to a single recipent.

recipients 'ssasidaran86@gmail.com'

  from @admin_name   subject sub   body :cid => @cid, :name => user_detail.name , :addressing => @addressing , :admin_email => @admin_email, :admin_name => @admin_name   content_type "text/html"

how to cc recipents in rails -2.3.8

http://railsapi.com/doc/rails-v2.3.8/classes/ActionMailer/Base.html