Question

chance behavior
is unpredictable in the short run but has a predictable pattern in the long run.
never has a predictable pattern whether it is analyzed in the short run or the long run.
always has a predictable pattern both in the short run and in the long run.
has a predictable pattern in the short run but is unpredictable in the long run

Explanation:

Chance behavior, like coin - tossing, is random in the short run. For example, you can't predict if the next coin toss will be heads or tails. But in the long run, such as after thousands of coin tosses, the proportion of heads and tails approaches 50 - 50, showing a predictable pattern.

Answer:

is unpredictable in the short run but has a predictable pattern in the long run.