What is a confounding variable? What are some examples of confounding variables?

Who wants free brainliest and free points for this drivers ed question! if answered correctly! in the u.s. highway numbering system, north-south routes have numbers that end in a. "0" b. "1" c. a letter d. an even number

Question 12 which was not a reason the industrial revolution began in england? a) leading world exporter b) favorable finance institutions c) independent local governments d) large labor force question 14 who did not lead the fight to end slavery? a) william wilberforce b) toussaint l’ouverture c) simón bolívar d) olympe de gouges question 15 which was not an underlying cause of the revolutions of 1830 and 1848 in europe? a) increasing aristocratic discontent b) budding romantic movement c) rising tide of nationalism d) growing liberal spirit

What type of commercial speech is not protected by the 1st amendment?