Which countries were represented in the SpaceX crew that visited the ISS?

The crew that visited the International Space Station (ISS) through SpaceX missions typically includes astronauts from various space agencies, primarily NASA, as well as international partners. In the case of the correct answer, the inclusion of representatives from the USA, Japan, and Russia reflects the international collaboration in human spaceflight.

NASA has a long-standing partnership with the Japanese space agency JAXA, which has contributed astronauts to ISS missions. Similarly, Russia's space agency, Roscosmos, has been one of the key partners in the ISS program since its inception, with Russian cosmonauts frequently flying on missions to the station. This combination highlights the cooperative nature of space exploration, where astronauts from these nations work together aboard the ISS, showcasing their individual missions and the shared scientific goals.

The other options present combinations of countries that have not all participated as crew members in the same SpaceX missions to the ISS. This reinforces the accuracy of the correct response.