Answer would be B, Cooking it too quickly.
Inexperienced cooks, often prevent flavor from developing in food by cooking it too quickly.
When a food is made, it is made sure that it is cooked to its proper time. Because when food is cooked for a proper time, it gives off flavors that make it delicious to eat. Inexperienced beginners make this mistake of cooking in a hurry and in a short time period, food doesn't give off its nutrients to make flavor of the dish.