Compare the rates with the factor change in concentration, but be careful to compare just those equations where you change only 1 concentration at a time. You can use the general formula [conc change]^x = rate change factor, and it is x that you need for the rate law.
First, compare equations 1 and 2. When you double the concentration of HCl, you double the rate. Thus, for HCl, ^x = 2, so x = 1, the reaction is 1st order in HCl.
Compare equations 1 and 3. Doubling the concentration of propanone doubles the rate. Thus, for propanone, ^x = 2, so x = 1 and the reaction is 1st order in propanone.
Comparing equations 1 and 4, doubling the concentration of I2 has no effect on the rate. Thus, ^x = 1, so x = 0 and the reaction is 0th order in I2.
This gives you 1, 1, 0, which is answer D.