Which phrase signals a cause-and-effect relationship? 1.not long after
2.this led to
3.begin with
4.at that point

2. This led to

Explanation:

This phrase implies that the previous event was the cause of the second. The other phrases only state that something happened after a previous event.

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

the original because it was the first to be created which means it is most likely to be tried the hardest. meaning the actors tried their hardest to make it right because shakespeare was so famous.

hope this : )