The subjects of an experiment should be selected at random so that they represent the population from which they come.
O
A. True
O
B. False

True

Step-by-step explanation:

The subjects of an experiment should be selected at random so that they

represent the population is true.

Once the sample size has been decided, a sample should be taken from the sample size which will represent the population. This gives everyone an equal chance of being selected as there's no bias.

1. perpendicular

2. parallel

3. perpendicular