Which pair of variables has a clear causal link?
a. sales of hot dogs and cold coffee at a snack bar
b. the number of road accidents and the number of vegetarians in a city
c. the amount of snowfall and the number of wins for a hockey team
d. the number of units sold by an appliance company and its annual revenues

How can lung cancer best be prevented? a. by getting regular screeningsc) b. by avoiding cigarette smokec. by monitoring cholesterol levelsd. by avoiding nown allergensherrwww

When creating a plan for the use of space in an early childhood educational setting, it is best to plan for clear passageways throughout the classroom. design only small, cozy spaces so that children feel safe. keep check-in and check-out areas outside the room. thoroughly conceal the toilet and hand-washing area for privacy.

What is one way that cold and flu viruses spread? a.by transfusing contaminated blood b.by inhaling contaminated droplets c.by eating contaminated meat d.by drinking contaminated water