Question

Read the passage.

(1) Does cell phone use lead to harmful effects from radiation? (2) Many Americans would love to know the answer, since cell phone use is at an all-time high. (3) Cell phone users abound, most are not well informed about the potential hazards associated with cell phones. (4) Therefore, cell phones should come labeled with information regarding the dangers of using them.

Which transition would be best to use at the beginning of sentence 3?

Most importantly
In addition
Although
Therefore

Answer 1

In addition

It adds another supporting point (many users and most are uninformed) before the conclusion in sentence 4.