hich of the following is a valid deductive argument? Smith is one of the most common last names in the United States. My friend Todd is a very common person. Therefore, Todd's last name is Smith. For over five decades, fantasy fiction has been very popular. It will probably continue to be popular in the coming decade. All cyclists are health-conscious. Byron is health-conscious. Therefore, Byron is a cyclist. Every time it snows, the roads need to be plowed. It is supposed to snow later today. Therefore, the roads will need to be plowed later today.