Answer:
Strong
Explanation:
There were lots of new jobs and economic growth in the 1960's, which makes it strong. However, during recessions, it would be weak, due to economic downturn.
The principle of superposition states that the oldest sedimentary rock units are at the bottom, and the youngest are at the top. Based on this, layer C is oldest, followed by B and A. So the full sequence of events is as follows: Layer C formed.
I am so confused on this question…