\textbf{In a population of university students, 20\% of the students have experienced feelings of math anxiety. If we select 8 students, what is the probability that exactly three have experienced math anxiety?} 
选项为:A:$${8 \choose 3} (0.20)^{3} (0.80)^{8}$$  B:$${8 \choose 3} (0.20)^{3} (0.80)^{5}$$  C:$${5 \choose 3} (0.20)^{3} (0.80)^{5}$$  D:$$(0.20)^{3} (0.80)^{5}$$  E:$$(0.20)^{5} (0.80)^{3}$$  请回答其中一个选项.