Research into the Consequences of Motor-Voter Laws Has Shown That

 Research into the consequences of motor-voter laws has shown that  

A)  less burdensome registration processes rarely have much of an impact because people don't find out about them. 
B)  people are suspicious of less burdensome registration processes and are thus unlikely to use them. 
C)  people who register when the process is free are more likely to vote. 
D)  people who register when the process is free are less likely to vote. 
E)  None of these are correct.