Frederick Douglass was an African-American social reformer, abolitionist, orator, writer, and statesman.
A colon, when placed between two numbers indicates a ratio.
For example, 1:1 is saying that something is at a 1-to-1 ratio.
This would be better in the Math section though, but I'm happy to answer.
Answer:I believe the answer is
The evidence relates to the claim but does not sufficiently address teenagers' resentment of the pressure to go to college.
B- Publishers liked the device at first but then objected to pricing.