Answer: but.
however.
in spite of.
on the one hand/on the other hand.
in contrast.
on the contrary.
still.
yet.
Explanation:
The answer is <span>Marks the beginning of a distant historical period.
For example, the tragedy of 9/11 could be considered as a turning point because it becomes the reason for Government agencies to start various cyber security programs to monitor potential terrorist activities that endanger the safety of the nation's land (which was leaked by edward snowden)</span>
B. Never reach your full potential