Answer:
A. widespread police corruption
Step-by-step explanation:
The "police corruption" in Mexico has long been an issue. It is the reason why there is an extensive activity of drug trafficking in the country. Drug cartels are hard to eliminate in the country because the police can be bribed into ignoring such illegal organizations. Some of the police are even favoring drug trafficking because they can earn a lot of money from it and they can also get several connections.