17 How did the Transcontinental Railroad change the physical landscape of the US? СА. Forests decreased due to cutting down trees used for building railroads. СВ. Homes and businesses decreased due to constant loud construction. OC. Mountains and valleys were devastated by fires set to create new tunnels. OD Lakes and rivers were depleted during the construction of the railroads.​

Donald is studying the eating habits of all students attending his school. he samples the population by dividing the students into groups by grade level and randomly selecting a proportionate number of students from each group. he then collects data from the sample. which type of sampling is used? select the correct answer below: systematic sampling convenience sampling stratified sampling cluster sampling

Why do you think americans were so fascinated by this idea of the united states stretching from “sea to sea”? give 2 reasons

What speech washington achieve national prominence as a leader in the civil rights movement? "atlanta compromise" "i have a dream" "malice towards none"