Final answer:
The South's reaction to the Civil Rights Act of 1964 involved significant resistance to black voter registration, as evidenced by the fierce opposition and low black voter registration rates in places like Selma, Alabama.
Step-by-step explanation:
Based on the information provided, it can be concluded that the South's reaction to the Civil Rights Act of 1964 was largely one of resistance and opposition, particularly in southern states like Alabama. Despite the Act's intent to end discrimination in voting, local officials and segregationists actively worked to prevent black Americans from registering as voters. Evidence of this includes the violent responses to civil rights activities in Selma, the very low percentage of registered black voters in cities like Selma (with only 2 percent of eligible black voters registered), and the use of bureaucratic obstacles such as literacy tests to disenfranchise African American voters. The opposition to black voter registration prompted leaders like Martin Luther King Jr. to focus efforts on areas like Selma to highlight the issue, which ultimately led to the passage of the Voting Rights Act of 1965, addressing the disenfranchisement tactics employed.