What was Henry David Thoreau protesting in the 1840s when he refused to pay his taxes?

Identify the dependent and independent variable in the following hypothesis: There is a positive relationship between name recognition and campaign spending. Using the two variables, state the null hypothesis. Why is the null hypothesis important?

What will be an ideal response?

Although public opinion does not fluctuate erratically, change can occur

A) ?as a result of a presidential state of the union address. B) ?when older voters change their minds collectively on an issue. C) ?when different generations with different experiences enter the electorate. D) ?when pollsters refine their questions to get the answers they are looking for. E) ?when everyone maintains the same opinion about current topics.