Which of the three options you choose depends entirely on the strategy you want to pursue internationally. One thing is clear: directories and subdomains only make sense if the domain is not a ccTLD. Instead, you need so-called generic top-level domains (gTLD). These are domain extensions like "c.om", ".net" or ".blog", which only become country-specific by using subdomains or directories. All three variants have advantages and disadvantages. In order to get a more detailed overview, we have prepared all pros and cons for you in a graphic.