Final answer:
The system of preachers called 'masands' was set up by Guru Amar Das Ji to facilitate the collection of offerings and spread Sikhism. Correct option is B.
Step-by-step explanation:
The system of preachers called 'masands' was established by Guru Amar Das Ji, the third of the eleven Sikh Gurus. The Masands were responsible for collecting the offerings from the Sikhs, which were then used to finance the building of gurdwaras and other community activities, as well as proselytizing and teaching the values of Sikhism.
This structure contributed to the spread and consolidation of the Sikh community during that period.