The events involved in the experiment were selected from five people and arranged in four positions, with a total of A 5 4 = 120.
The event that meets the conditions is to arrange for both A and B to participate according to the meaning of the question, then A and B can do a job other than driving, and the result is A 3 2 =6.
The other two jobs can choose two from three people, 3 2 = 6 results, a total of 6×6=36 results.
Only one party of Party A and Party B participated, and the other three parties participated, totaling C 21C 31A 3 3 = 36.
∴ There are 36+26=72 results.
The required probability is 72 120 = 3 5.
So choose a.