The correct answer is option (B):
SPRQ
The correct sequence is SPRQ. Let's break down why:
* **S: On the Principal rests much:** This establishes the subject of the sentence and a clear starting point. "On the Principal" sets the scene. "rests much" implies that something relies on the principal.
* **P: Of the responsibility for:** This logically follows, specifying what responsibility rests on the Principal. It connects the principal to a specific burden.
* **R: The success or failure:** This clarifies the area of responsibility mentioned in 'P'. The Principal's responsibility relates to something like success or failure.
* **Q: Of the class:** This completes the thought, stating what the success or failure pertains to. It specifies that success or failure is of the class.
Combining these parts, the sentence reads, "On the Principal rests much of the responsibility for the success or failure of the class." This is a coherent and meaningful statement about the principal's role.
The other options do not form a grammatically correct or logical sentence structure.