This question consists of a sentence which is divided into

Solution

This sentence is an example of a third conditional structure, which refers to hypothetical past events and their consequences. The correct form should be "she would not have" instead of "she will not have" because:The past perfect ("Had she been more cautious") correctly sets up the condition.The result clause should use "would have + past participle" to indicate what could have happened if the condition had been met.Corrected Sentence:"Had she been more cautious, she would not have fallen victim to such a well-planned fraud."