Typically, slaves would travel from different countries on boats known as "slave ships." The quality of these ships were extremely poor, because the slaves were all crammed inside the boat. Many of the slaves would die on voyages to different countries.
The best reason as to why the caliphs demonstrated religious tolerance to Jews and Christians would be because "D. the caliphs knew freedom of worship led to an overall stronger empire," since allowing people to worship freely meant that they were less likely to rebel against the state.
Conventionally, each state receives in the electoral collage THE NUMBER OF ELECTOR THAT IS EQUAL TO THE TOTAL NUMBER OF SENATORS AND REPRESENTATIVES IT HAS.
An exception is Washington DC, which always has the same number of electors as that of the state that has the least population of people in US.
Jews, Muslims and Catholics.
Hope this helps.
