Answer:
The question is missing below options:
A.7.6%
B.8.9%
C.12.48%
D.22.05%
The correct option is C,12.48%
Explanation:
Note the difference between my 12.49% and the 12.48% is due rounding error.
The computation is shown below:
Annual property rent ($900*20*12)                      $216,000.00  
Less; provision for vacancy (5%* 216,000)           ($10,800.00)
Effective gross income                                           $205,200.00  
deduct:
maintenance  expenses                                         ($17,500.00)
Insurance                                                                ($7,200.00)
taxes                                                                   ($7,500.00)
Utilities                                                                     ($6,400.00)
management fee(10%*$205,200)                         <u>($20,520.00) </u>
Net operating income                                            <u> $146,080.00</u>  
Property investment                                                <u>$1,170,000.00</u>
Investor's rate of return(net operating income/initial investment)
investor'r rate of return=$146,080/$1,170,000=12.49%