If, While Searching a Computer for Evidence of a Specific

If, while searching a computer for evidence of a specific crime, evidence of a new, unrelated crime is discovered, the best course of action is:

A) Abandon the original search, and pursue the new line of investigation
B) Continue with the original search but also pursue the new inquiry
C) Stop the search and obtain a warrant that addresses the new inquiry
D) Continue with the original search, ignoring the new information