Determine which legal clause the following paragraph belongs to: a.  will review the Customer' s roaming data usage( Review) : every 3 months during the term of this Agreement following the Service Commencement Date of the Shared Roaming Data Service Plan( ' Review Per lod' ) ; and on termination of this Agreement.  b.  will total the Customer' s actual usage across all Connections connected to the Shared Roaming Data Service Plan over the Review Period and divide this by 3( Average Monthly Roaming Data Usage) .  C.  will if any review( whenever conducted) determines that the Average Monthly Roaming Data Usage exceeds the monthly roaming data allowance for the current Shared Roaming Data tier, move the Customer to a higher Shared Roaming Data tier( asset out in the table above) appropriate to the Customer' s actual roaming data is less than the monthly roaming data allowance for the current Shared Roaming Data tier, move the Customer to a lower Shared Roaming Data tier( asset out in the table above) appropriate to the Customer' s actually roaming data usage but not below the lowest Shared Roaming Data tier set out in the table above.  d.  will apply the revised monthly Subscription Charges for the alternative Shared Roaming Data tier following any review, at the next bi ling cycle following the Review Period.