A's New Word

A has a new word, "why." I feel like we didn't get to the why stage with C until much later. Much, much later. I'm still unclear whether A actually knows what she is saying or is just mimicking C, but every time I make a statement such as "You can't strip down A, you'll freeze," she responds with "Why?". I now have two children demanding an explanation for EVERY MOVE WE MAKE.

Mommy: "It's breakfast time!"

C: "Why?"

A: "Huh [A's version of yes], why?"

Mommy: "Because the clock says it is 7:00."

A: "Why?"

C: "Yeah, why?"

I'm going to go insane.