A bottleneck event reduces the population of bears in one area by 80% which statement is correct about the Bears gene pool?

It has temporarily decreased so disadvantageous traits are more likely to be passed on
It has temporarily decreased so disadvantageous treats are less likely to be passed on
It has temporarily increased, so disadvantageous traits are less likely to be passed on
It is temporarily increased, so disadvantages traits are more likely to be passed on

It has temporarily decreased so disadvantageous traits are more likely to be passed on.