which sentence or sentences have correct parallel structure?\n\nbefore becoming involved in animal-assisted…

which sentence or sentences have correct parallel structure?\n\nbefore becoming involved in animal-assisted therapy, a dog must be able to sit on command, to stay until released, and to obey other basic instructions.\n\nbefore becoming involved in animal-assisted therapy, a dog must be able to sit on command, stay until released, and obey other basic instructions.

which sentence or sentences have correct parallel structure?\n\nbefore becoming involved in animal-assisted therapy, a dog must be able to sit on command, to stay until released, and to obey other basic instructions.\n\nbefore becoming involved in animal-assisted therapy, a dog must be able to sit on command, stay until released, and obey other basic instructions.

Answer

Brief Explanations:

Parallel structure requires that items in a list follow the same grammatical form. In the first sentence, the list uses a consistent "to + verb" (infinitive) pattern for all three items: "to sit," "to stay," and "to obey." In the second sentence, the list uses a consistent pattern where the "to" from the initial infinitive "to sit" is understood to apply to the subsequent base verbs: "sit," "stay," and "obey." Both methods are grammatically correct and maintain parallel structure.

Answer:

Both sentences have correct parallel structure:

  1. Before becoming involved in animal-assisted therapy, a dog must be able to sit on command, to stay until released, and to obey other basic instructions.
  2. Before becoming involved in animal-assisted therapy, a dog must be able to sit on command, stay until released, and obey other basic instructions.