Utilize the input text as a context reference, choose the right relationship between 'concentration' and 'nine' from the options.
Options: original broadcaster, position held, business division, legal form

To summarize, through this agreement, we created a Master Lease structure which reduces our risk in the event of restructuring, extended our average lease term by nine years and we've given ourselves the option to reduce our concentration to AMC, by transitioning seven theaters.
original broadcaster