Question

review the paragraph about the first successful combat helicopter rescue.
the first successful combat rescue mission by helicopter occurred at the height of world war ii. a helicopter exhibition at the national air and space museum inspired me to learn more about this mission. on april 21, 1944, one american and three british soldiers crash - landed their plane behind enemy lines in southeast asia. although wounded, the men managed to escape into the jungle. they were soon located by an american war plane, and the u.s. military sent helicopter pilot carter harman to retrieve them. since the aircraft could only carry one passenger at a time, harman had to make four individual trips, all while hoping to avoid being spotted by enemy forces. despite a delay halfway through the rescue, caused by an overheated engine, harman eventually carried all four men to safety.
why should the bolded sentence be removed?
it provides information that is redundant.
it provides unnecessary personal information.

Explanation:

The bolded sentence talks about what inspired the author to learn about the mission, which is personal (the author's inspiration) and not relevant to the core topic of the first successful combat helicopter rescue. The other option about redundancy is incorrect as the sentence doesn't repeat info. So the reason is it provides unnecessary personal information.

Answer:

It provides unnecessary personal information.