Answer:
It is false.
Step-by-step explanation:
At Mattel, a marketing information system stores data on regional sales activities, promotional costs, and international inventory levels. These data are not examples of external sources but are internal sources.
Internal sources of market information are informations that are gotten from within the company such as regional sales activities, promotional costs, and international inventory.
However, the external sources of information are informations that are gotten outside of the company such as survey from customers, competitors etc.