A beauty product company conducts a study to test the effectiveness of a new shampoo to control split ends. One hundred subjects have volunteered to take part in the study and will be divided into a treatment group and a placebo group. The study leader will assign the subjects to the groups randomly using slips of paper. Select each statement that could describe an appropriate step in the labeling process. Write “treatment group” on 50 slips of paper and write “placebo group” on 50 slips of paper.

Number the subjects from 1 to 100, and write the numbers 1 to 100 on the slips of paper.

Write the name of each subject on a slip of paper.

Write random one-digit numbers on 100 slips of paper.

Use color-coding to distinguish the treatment group from the placebo group.