A、They were just as busy as people of today. B、They saw the importance of collective efforts. C、They didn’t complain as much as

I think a lot about time and not just because it’s the name of the news organization I work for. Like most working people, I find time or the lack of it, are never ending frustration and an unwinable battle. My every day is (16) a race against the clock that I never ever seem to win. This is hardly a lonesome complaint, according to the families and work institutes, national study of the changing work force, (16) 55% of the employees say they don’t have enough time for themselves. 63% don’t have enough time for their spouses or partners, and 67% don’t have enough time for their children. (17) It’s also not a new complaint. I bet our ancestors returned home from hunting wild animals and gathering nuts, (17) and complained about how little time they had to paint battle scenes on their cave walls. The difference is that the boss of the animal hunting and the head of nut gathering probably told them to "Shut up!" or "No survival for you!" Today’s workers are still demanding control over their time, the difference is: today’s bosses are listening. I’ve been reading a report issued today called When Work Works, produced jointly by 3 organizations. (18) They set out to find and award the employers who employ the most creative and most effective ways to give their workers flexibility. I found this report worth reading and suggest every boss should read it for ideas.
16. What is the speaker complaining about?
17. What does the speaker say about our ancestors?
18. Why does the speaker suggest all bosses read the report by the 3 organizations?