Best Practice for calling CFC

Hi,

In a web application, if I need to call a CFC method from a different CFC, what would be considered as the best way of doing it?

For example, let's say I have two components: Customer and Product.  From a method functionA in Customer, I would like to call functionB in Product.  I can do one of the following, but which way is best practice and why?

1.  Create a Product object in functionA, and use it to call functionB

<cfcomponent name="Customer">      <cffunction name="functionA">           <cfset productObj = createObject('component', 'Product')>           <cfset productObj.functionB()>      </cffunction> </cfcomponent>

2.  Pass a Product object when we initialize a Customer object, and use that to call functionB

<cfcomponent name="Customer">      <cffunction name="init">           <cfargument name="productObj">           <cfset variables.productObj = arguments.productObj>      </cffunction>      <cffunction name="functionA">           <cfset variables.productObj.functionB()>      </cffunction> </cfcomponent>

3.  Assume that Customer object has access to the Product object in the application scope

<cfcomponent name="Customer">      <cffunction name="functionA">           <cfset application.productObj.functionB()>      </cffunction> </cfcomponent>

Thank you very much.