Inferring is easily done but just as easily misunderstood. Now I suggest answering the question backwards. First finding parts of the source and then inferring what it means. BUT the part in the source has to be seen. You cannot Infer in this section so visible things are only accepted. If it is a text I suggest only quoting it.
~into the effectiveness of the civil rights act
Eg. “In the south, my people deserve segregation to their negro slaves”- 1969
This shows that racism continued as it is dated in 1969 and the civil rights act was introduced in 1954
From this I can infer that the civil rights act was not effective in dealing with the racism in the south