Martina believes that high doses of caffeine slow a person's reaction time. to test this belief, he has five friends each drink three 8-ounce cups of coffee and then measures their reaction time on a learning task. what is wrong with martina's research strategy?

Describe at least three effects of the drug war in mexico.

Germany's black forest is being destroyed as a result of which environmental issue ?

Which best describes california population when it became a state in 1850? a.because of the gold rush attracting settlers all over the world california population diverse.bcalifornia had banned foreign immigrants at the start of the gold rush.so,the states population was made up of entirely of americans from other parts of the country.c california had a large african population because many southern planters had moved their enslaved africans to start large farms.d the indian removal act had led to the relocation of thousands of eastern native americans to california.as,a result the majority of californias population was native american