Area outside the atomic nucleus where the probability of finding electrons is high.
cloud model emphasizes the electron is not in a fixed orbit or distance from the nucleus center.

There is no reason to think the results are biased or not conducted properly but you should not assume the results are correct just because they were done in a laboratory so the answer would be c. it is likely to be reliable because the results support the conclusion presented.

When china's civil war resumed, the nationalists held an advantage because the nationalist had more soldiers  than the communist.