What Happens to Reagents When Sodium Hydride Is Added?

[sd34]

Homework Statement

I need to find the molecules A, B, C, D from the following guided reaction.

Relevant Equations

I can’t get past A...I did the aldol condensation for A, but then I’m stuck at this point...I can’t figure out how to go on from there.

 

[TeethWhitener]

I think your first step isn’t right. What happens to your reagents when you add sodium hydride?