Four situations are described. i. Children who watch more television, play more video games.
ii. Children who increase their physical activity, increase their total
number of calories burned.
iii. Children who get more questions correct on a test, get a better
grade on the test.
iv. The warmer the weather, the more children ride their bicycles.
Which situation(s) does NOT show causation?
A. iv only
B. i and iv only
C. ii, iii, and iv only
D. ii and iii only

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