How did railway workers affect the Tsar's ability to return to the capital?

Railway workers played a crucial role in the events surrounding the Tsar's ability to return to the capital during the time of revolution in Russia. By going on strike, they were able to effectively disrupt the transportation networks that were essential for the Tsar's movement. Railways were the backbone of communication and travel; therefore, a strike among these workers meant that crucial railway lines were blocked, preventing the Tsar from undertaking his journey back to the capital.

The impact of this strike was significant as it not only hindered the Tsar's plans but also signified the growing unrest among workers and the populace, who were increasingly disillusioned with the Tsar's regime. This action exemplified the rising power of organized labor and the changing attitudes towards the monarchy, illustrating how railway workers directly influenced the political landscape by taking a stand that obstructed royal authority and control.

The other options do not reflect the direct action that led to the Tsar's inability to return to the capital. Supporting his return or collaborating with the Bolsheviks, while they could be actions taken by workers, do not address the direct impact of their strikes. Organizing a coup signifies an outright takeover of power, which was not the focus of the railway workers in this context