In the blank, write the letter of the kind of connector used in each sentence.

a. reason
b. result
c. purpose

1		Language was developed, so many changes became possible.
2		Many changes became possible since language was developed.
3		Because language was developed, many changes became possible.
4		Language was developed. Therefore, many changes became possible.
5		Since ancient Egypt had few trees, the Egyptians developed the first kind of paper out of a common weed called papyrus.
6		Many people learn English so that they can find better jobs.