Hello!
First of all there are fifteen total vegetables. First of all we have the probability that he will get a tomato.

Now if he were to select a tomato there would only be fourteen vegetables left. Now our probability will be out of 14. Now we have the cucumber.

Now we multiply our two probabilities.

Therefore, Bodhi will have 
D) 5/42 chance of selecting a tomato and then a cucumber.
I hope this helps!