Thanks for providing the question Farid!
The question is referring to “return on investment” which is a financial management technique under the “Project Cost Management” area (chapter 7 in PMBOK 5th edition). The formula is:
fv=pv*(1+r)^n or future value=present value*(1+rate)^number of years
From questions:
present value=10,000
rate=.05
number of years=10
fv=10,000*(1+.05)^10=16,289
So I get “c” as the answer. This tells you what the value of your investment will be in 10 years at this rate.
Hope this helps!