What idea about the bubonic plague is a result of new research?

When did martin luther king, jr. deliver his famous "i have a dream" speech? a. during the montgomery bus boycott b. during the birmingham campaign c. during his acceptance of the nobel prize d. during the march on washington

How many senators are there from each state? a. two c. one b. three d. the number depends on the state’s population

Which two sentences in this passage talk about china’s efforts to curb environmental degradation?