From the Standpoint of Cash Flow,what Is the Most Obvious

From the standpoint of cash flow,what is the most obvious difference between domestic and foreign projects?

A) The cash flow from domestic projects is much more certain than it is from foreign projects.
B) Cash flow from foreign projects is usually much larger than it is from domestic projects.
C) Cash flow from domestic projects is received much quicker than cash flow from foreign projects is received.
D) Domestic projects typically produce cash flow in the domestic currency,while foreign projects produce cash flow in the currency of the foreign country and may even produce cash flow in multiple currencies.