Final answer:
The correct word to fill in the blank is 'swindle,' which implies deceit or trickery in taking the better item at the expense of someone else, in this case, the younger sister.
Step-by-step explanation:
The sentence “She tried to ____ her younger sister by taking the bigger candy bar first.” can be filled with the word swindle, which means to cheat or defraud someone out of something valuable.
The word rapt does not fit in this In the given sentence, the word 'swindle' can be used to complete the blank. 'Swindle' means to deceive or cheat someone, usually in order to gain an advantage for oneself.
In this context, the girl is trying to deceive her younger sister by taking the bigger candy bar first.context as it means wholly absorbed or engrossed. The usage of swindle suggests an element of deceit or trickery in trying to get the better item at the expense of her sister, implying a sly or dishonest action.