Final answer:
The finding that indicates oliguria is urinary output of 350 mL/day.
Step-by-step explanation:
Oliguria is a condition in which the urinary output is less than 600 mL/day. Among the given options, the finding that indicates oliguria is 1) Urinary output of 350 mL/day.
Oliguria can be caused by various conditions such as fever, shock, vomiting, and diarrhea. It is important to note that oliguria can indicate a malfunction in the renal system and impaired organ function.