I have attempted the question, but didn't post what I did. Sorry
I know that the acetoacetic ester syn thessi yelds a methyl ketone by adding 3 carbons to the reactant. I am so confused in this question, because I tried to find one choice that has the most Carbons (since it's adding 3 carbons..then it must be long chain), but I don't know why the reactant is not given in this problem. So yes, what I did was trying to find the choice with the most Carbons, and I ended up wrong.
Sorry, I know that is not an acceptable way of attempting this question, but I really have no other choice to do this when they don't give me the reactant.