If Leslie is 4th, then we are in scenario two.
There are four spaces after the first Frank, and we need to fit in 2 Gladys and one Frank.
The question just assigned Leslie to one of those four spaces.
(The other Leslie has to go in 1, because one Leslie always goes there.)
Since we can’t put Frank in 6th, Gladys must go there. And Gladys must also go third because we need a Gladys in between the two Franks.
Harvesting can only be demonstrated second or fifth (since Frank has to demonstrate harvesting.)
B is CORRECT, since it says second and no answer choice says fifth.
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