Pls helppp Which of the following describes why the atomic bomb was used to end WWII?(1 point)

Allied officials were trying to avoid having to invade Japan since Japan would not surrender.

This would make Germany surrender as well.

More troops were needed to help Soviet troops in Europe.

Allied forces were losing too many aircrafts.

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