What part of a microscope adjust the brightness of an image

Which pronoun has an unclear antecedent in the following sentences? the sixth-grade students liked volunteering their time to read to the elderly people in the hospital. it made them happy. a. their b. it c. them d. no unclear antecedents

The ideal that all people should be treated equally. a. rule of law b. representative government c. limited government the bill of rights and the declaration of rights both seek to protect a. the separation of powers b. personal liberties c. representative government

How can christianity affect the cultural landscape of a place?