Select the correct answer.

the chart gives the number of cases of pollo between 1937 and 2011. polio is an infectious disease that causes paralysis and sometimes death.
the pollo vaccine was introduced in 1955. what can be concluded about the polio vaccine?
a. it was successful eradicating polio from the united states.
b. it has no effect on the number of polio cases in the united states.
c. it reduced the number of polio cases, but deaths from polio stayed constant.
d. it initially lowered the number of polio cases, but the number of us cases remain high.

How does the parallax of a nearby object compare to that of an object farther away?

Imagine you work as a consultant, and your daily job involves listening to the constructive criticism of others. as part of your job, you must listen to opposing viewpoints to make important decisions. in this activity, you are a consulting dam engineer. you must make a decision about four different dams; should they be repaired, taken down, or left alone? you will listen to contrasting opinions about what should be done with the dams before you make the final decision. as the consulting dam engineer, what do you decide to do with this dam? explain your reasoning. by making your decision, did you support the opinions of the mayor and/or the dam safety official? why or why not? (site 1)

Modern democracies function as republics in which elected officials make decisions for the majority of the people.