Which of the Following Statements Is True About the Anion $\infty$

Multiple Choice

Which of the following statements is true about the anion formed from the reaction of diethyl malonate with sodium ethoxide?

A) It can react with an $\infty$ , $\beta$ -unsaturated ester by conjugate addition.
B) It can condense with aldehydes and ketones.
C) It can be alkylated with an alkyl halide.
D) It is resonance stabilized.
E) All of the above statements are true.