Prompt: Mexican street vendors prefer to sell their goods on the black market rather than register with the government. This is because 
Completion A: registering a business in Mexico gives you magic powers. 
Completion B: registering a business in Mexico makes you a good dentist. 
Completion C: it's too much of a hassle for the working class to go through legitimate channels. 
Completion D: registering a business in Mexico makes more money.
Completion C