THE ANSWER FOR UR QUESTION IS
B,C AND D CAN BE EASILY FOUND IN PAPER DICTIONARIES
BUT FOR A IT IS NOT REALLY THAT USEFUL COMPARED TO B ....
HOPE THIS HELP U ALOT ...
^_^
Answer:
Follow the footsteps of those who won't lead you astray.
If you have already had a research questing identifies, you should: B, turn it into an assertion.