Final answer:
The type of irony represented in this question is situational irony. William tells his parents that he made a B in biology, hoping that he can convince them to let him continue on the basketball team. However, his announcement is met with stunned silence because his parents already know that he actually received a C in biology.
Step-by-step explanation:
The type of irony represented in this question is situational irony.
Situational irony occurs when there is a contradiction between what is expected to happen and what actually happens.
In this case, William tells his parents that he made a B in biology, hoping that he can convince them to let him continue on the basketball team. However, his announcement is met with stunned silence because his parents already know that he actually received a C in biology.