Answer:
B. $170,000.
Explanation:
X company
statement of cash flow
For the year ended 
Net income (balancing) (Note - 1)                                   $170,000
Cash flow from operating activities                      
Depreciation expense                                   $25,000
Increase in account receivable                     $(20,000)
Increase in inventory                                     $(10,000)
decrease in Prepaid Expenses                     $25,000
Decrease in Accounts Payable                     $(20,000)
Increase in Deferred Revenue                      $30,000
<u>Cash flow                                                                                $30,000</u>
Net cash flow from operating activities                              $200,000
Note 1:
Net cash flow from operating activities - Total changes in working capital=                        $200,000-$30,000 = $170,000.