In regards to the perspective of a U.S. investor, the false statement is
a.The cash flows of assets denominated in a foreign currency expose the investor to uncertainty as to the actual level of the cash flow measured in that foreign currency.
Explanation:
The US investor in the foreign market is investing in the foreign currency but has the advantage as the value of the foreign currency is determined in terms of the dollar so the cash flow to US is very likely to free and often benefits the country when other countries evaluate slightly.
The uncertainty being talked about here is much less pertained in the  sense that the US dollar dominates the foreign stock too so the investor has an advantage in predicting when to take out their money.