Who gets credit for inventing the tank?

Who deserves credit for the tank if similar ideas appeared independently in several countries?

Credit goes to the people who built and operated the system first, distinguishing an early concept from an operational weapon.

A comment notes that several countries conceived tank-like systems independently. The answer agrees that the underlying idea appeared in more than one place and assigns historical credit to the people who built a working vehicle and brought it into operations first. A comparison with HMS Dreadnought shows how technological priority often rests on operational delivery rather than the earliest proposal alone.