Answer: OA X+1 <17
Explanation:
Let us pull out details from the passage that we need.
[] elevator ... carry fewer than 17 people at a time
[] elevator operator is ... in the elevator at all times
[] x customers can travel
Since the operator does not count as a customer, this means that x + 1 people will be in the elevator.
Next, there must be fewer than 17 people in the elevator.
This means the answer to our question is:
O (A) X+1 < 17