Answer:
C) implicit collusion
Explanation:
Implicit collusion refers to a situation where competitor firms act in the same manner to try to control the market (price, supply or demand) of a good or service. Supposedly since the firms compete against each other, so they will try to make the customers believe that the similarities are coincidences or that the actions were caused by some external market force.
For example, Coke increases it price and by coincidence Pepsi also increases its price.