Answer:
Chronological
Explanation:
The following main points for a persuasive speech on a question of policy are arranged in chronological order.
I. Measles, which had been eradicated in the United States at the start of the 21st century, is once again becoming a serious health threat.
II. The primary reason for this development is the growing number of parents who choose not to vaccinate their children.
III. To protect the public health, the federal government should require that, absent a serious religious objection, every child should be vaccinated against measles.