Candy Foods just announced its Q$3$ earnings and it turned out to beat the market expectations. This outperformance is totally unexpected and greatly improves investor's confidence in this firm. Which of the following is more likely if the market is semistrong efficient?

a$.$ The prices of all stocks on the market increase rapidly to a higher price

b$.$ The stock price of Candy Foods gradually drops.

c$.$ The stock price of Candy Foods remains unchanged

d$.$ The stock price of Candy Foods increases rapidly to a higher price.