What is the BEST summary of the passage?
Many new drugs and treatments help people
who are sick. People volunteer to participate
in clinical trials.
Clinical trials test the safety and
effectiveness of a drug or treatment. It is
important that they be done correctly.
Clinical trial costs can be lowered by going to
where the volunteers live. This will make the
test samples more accurate.
The way that clinical trials are done has
changed. They now include more volunteers
than ever before.