Which of the following advances in technology improved land travel?

steamboats
airplanes
railroads
wagon trains

Explain how nationalism led to independence in nigeria.

Look at the graphic, which describes the steps of analyzing a writing prompt. which word best completes the graphic? a. formatb. thesisc. idead. directive

Dr. redbull conducts a study to determine whether her new energy drink children perform better on spelling tests. she randomly assigns children to one of two groups: group 1 receives her energy drink and group 2 receives water. she then gives both groups a spelling test and compares the results. which of the following is true about this study? a. group 1 is the dependent variable and group 2 is the independent variable. b. this is a correlational study. c. group 2 is the experimental group. d. the independent variable is the type of drink the children receive.