Final answer:
The correct answer is 'D. Cannot be determined' because the necessary information needed to calculate the number of students who would receive $250 or more is not provided in the original question.
Step-by-step explanation:
The question appears to be a statistical one, most likely related to probability or percentages. However, the provided information in the question seems insufficient to connect directly to the earlier statement regarding botanical specimens sent to Jefferson. The latter part of the question deals with statistics involving the distribution of a certain amount of money among a sample of students.
To determine how many students receive $250 or more, additional data regarding the distribution pattern or the probability model should be provided. Since this crucial piece of information is missing, the correct answer to the question 'How many are expected to receive $250 or more?' is D. Cannot be determined based on the given data.
The student might be confused or mixed the context of two different questions. It is essential to clarify the question's details with the student and obtain the relevant data to provide a precise answer.