Answer:
Too much information
Explanation:
There are multiple topics covered in this single passage - radios, cell phones, and television. There's no end goal to what this is talking about, it's all over the place. A paragraph should have a coherent and cohesive topic, which this does not.
Add a conjunction and separate the sentence into to or more sentences using a period and a capital letter.
yes
because it's good for you
They had to act quickly
c. at