Antoinetta has just developed a skill called object permanence. According to Piaget's stages of cognitive development, Antoinetta is most likely about to progress to the stage of cognitive development.

The answer is the preoperational stage.

Explanation:

Object permanence is a concept that explains all objects conserve their original properties, even if the parts are separated or distributed in a different way. For example, a child that understands that a chocolate bar sliced in four pieces is still the same amount of chocolate, has likely understood the concept of object permanence.

According to Piaget, the understanding of object permanence should appear during the the sensorimotor stage. In the example, Antoinetta is still probably in this phase, and about to transition to the preoperational stage.

C. They are stockholders in their regional Federal Reserve Bank.

Explanation:

United States have 12 Federal reserve banks that are spread out throughout the regions in United States. These banks were organized like corporations. Member of the banks were elected by the presidents and confirmed by the senate. These members act like some sort of shareholders that have the power to choose the "Officers" that oversee all operations conducted by the banks.

Depositary institutions are the institutions that are legally allowed to  accept deposits from consumers. They follow the regulations from the Federal Bank, but they do not have the power to make any form of control or changes within the Federal Reserve.