Answer:
A. Violent video games like Grand Theft Auto are a perpetual sources of controversy.
Explanation:
Option A contains a grammatical error because there is incorrect use of the article "a" for a subsequent plural word.
The correct answer can be correctly rewritten like this:
Violent video games like Grand Theft Auto are perpetual sources of controversy.
If you want to include the article "a" in that sentence, you can do so but you will have to change the "sources" to a singular word "source"
Which can be correctly rewritten as:
Violent video games like Grand Theft Auto are a perpetual source of controversy.
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B People talking on their cellphones are causing accidents
