Prachi, the office manager at a private practice, identified several quantitative relationships surrounding a patient's visit and wait time and modeled them with the following functions:
Function | Input | Output
- | - | -
$P$| Time of day, $t$ | People in waiting room, $P(t)$
$W$ | People in waiting room, $n$ | Patient's waiting time, $W(n)$
$L$ | People in waiting room, $x$ | Average length of visit, $L(x)$
**The expression $L(P(t))$ represents which of the following?**
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