What additional choices are considered copiable for an object on the stack?

The correct answer identifies the additional choices that are copiable for an object on the stack, specifically focusing on target and additional costs. In Magic: The Gathering, when a spell is cast and the object moves to the stack, certain characteristics of that spell become relevant for determining how it interacts with other game elements.

When it comes to things that can be copied, the game rules state that the targets of spells are not the only aspects affected; any additional costs paid to cast the spell also become part of what can be copied. For example, if a spell had an additional cost that was paid (like sacrificing a creature or paying extra mana), any copy of that spell created would also include that same additional cost. This principle ensures that the copied versions behave similarly to the original.

While the other options refer to various aspects of game mechanics, they don't directly relate to what can be copied when a spell is on the stack. Token status, colors, abilities, and characteristics like power and toughness are defined by other elements of the game and do not pertain to the spell or ability as it exists on the stack at that moment. Thus, recognizing that targets and additional costs are copiable allows for a better understanding of spell interaction and resolution in the game.