what is it meant by "it would be interesting to know how many workers had been displaced by these inventions"

I'm assuming the context is about an invention that caused many to lose their jobs. It isn't grammatically correct, but it's saying that the number of worker displaced by these inventions is very interesting, and hasn't been counted.

Explanation:

a yes vote means: the legislature, with a two-thirds vote, could change daylight saving time if the change is allowed by the federal government. absent any legislative change, california would maintain its current daylight saving time period

the answer is c have a good day