Answer:
forgive me if I'm wrong but I'm pretty sure its C.
The miranda rights act / case
The PPC (or PPF, same thing) shows economic growth because it outlines exactly what the economy can produce at that moment. When it shifts outward in any way (be it towards consumer and capital goods, or X and Y), that MUST be because of economic growth.
D. The Grand canyon's layers get older from bottom to top
The deeper you go, the older the layer
