Your answer will be "capable of being"
think of it as "able to *root*"
Things that can cause people to "grow up" are often seen as traumatic but, can be the exact opposite; inspiring the person or "opening their eyes".
It was when King George the third wanted a stronger government in the colonies. So he made the proclamation of 1763. It had the land of the Appalachian Mountains to the Indians for their hunting grounds.
The answer to the question is a. Packed.
