which best describes why investing can be such a challenge?\nall investments involve major risks.\nthere is…

which best describes why investing can be such a challenge?\nall investments involve major risks.\nthere is never a sure way to protect investments.\nthere are no guaranteed investments.\nall investments are totally unpredictable.
Answer
Brief Explanations:
Investing is challenging because there are no fool - proof ways to ensure returns. While not all investments have major risks (so the first option is wrong), and not all are totally unpredictable (so the fourth option is wrong), and there are some ways to protect investments to an extent (so the second option is wrong), the key is that no investment is guaranteed to succeed.
Answer:
There are no guaranteed investments.