Help me my brain is having a seizure

Critical thinking questions what factors led to the creation and implementation of operation reinhard? how did the residents of the ghettos respond to mass deportations and what occurred when the residents realized what happened to those deported? what did rudolf hoess’s testimony at the end of the war suggest about the final solution and planned deportation and resettlement? how did operation reinhard differ from earlier nazi actions and how was it similar? was resettlement seriously considered and why was it not used?

Will give read the sentence: (blank) starting to rain outside. which is the best word to complete the sentence? a : its b : its’ c : ’tis d : it’s

Need some on this. which answer is it?