Take context from the input text and decide on the accurate relationship between 'Airbus' and 'aircraft' from the options provided.
Options: employer, product/material produced, owner of, distribution format

Airbus has told buyer nations of the A400M transporter aircraft that it cannot deliver all of its high-tech defences according to plan, casting a shadow over some of its military uses as Europe battles growing instability on its borders.
product/material produced