Critical Reasoning (CR) | Re: "Life expectancy" is the average age at death of the entire

hello experts,

I am unable to comprehend what the argument is trying to convey here. Below are my thoughts on this

Premise: - "Life expectancy" is the average age at death of the entire live-born population. In the middle of the nineteenth century, life expectancy in North America was 40 years, whereas now it is nearly 80 years.

Conclusion: - Thus, in those days, people must have been considered old at age that we now consider the prime of life.

- The question stem asks us to WEAKEN
...

---