This is a bit of a complicated subject, but in general when the Czechs tried to implement liberal reforms in 1968 they were not implemented very quickly and were met with resistance.
I think it is the choice C
I think d. Latin descendents of Aeneas being Remus and Romulus
The correct answer should be reward. In order to reward buyers for buying, you put the prices lower even though in reality you could be making the same mount of money. You thus decide to earn less money but you reward your buyers for being loyal or you get them to buy.