Take context from the input text and decide on the accurate relationship between 'concentration' and 'nine' from the options provided.
Options: business division, original broadcaster, legal form, position held

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