please help me determine the rejection region and which answer is correct? bottom last question

Is the difference between the mean annual salaries of statisticians in Region 1 and Region 2 more than $6000? To decide, you select a random sample of Region 1 Region 2 statisticians from each region. The results of each survey are shown to the right. At a = 0.10, what should you conclude? X1 = $68,300 X2 = $66,000 61 = $8975 62 =$9225 n1 = 42 n2 = 40 Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. Choose the correct null and alternative hypotheses below. O A. HO H1 - H2 = 6000 O B. Ho: H1 - H2 > 6000 C. Ho: H1 - H2 $6000 Ha H1 - H2 # 6000 Ha: H1 - H2 $ 6000 Ha : HI - H2 > 6000 OD. Ho: H1 - 12 > 6000 OE. Ho: My - H2 2 6000 OF. Ho: H1 - H2 # 6000 Ha : H1 - H2 2 6000 Ha: H1 - H2 O C. z