Answer:
b.
Explanation:
b. No shanty comes close to as poor as mine.
A dependent clause can not express a complete thought and contains a subject and a verb so the dependent clause would be "shouldn't throw stones"
The correct answer is language barrier.
If people are ignored because of their inability to speak standard English, they have just encountered a language barrier. It is a kind of noise in communication. When there is a language barrier, there could be a difficulty in communication. I hope this answer helped you.
The word you'd want to use is focuses.