Here's a problem to solve: Sediments are generally classified by particle size. A student would like to classify sediments by their source. Which statement best describes this alternate classification?

Among the 4 following options, which is the correct answer?

- A: acceptable if the sediments are also identified by particle size
 
- B: acceptable if the factors used for the classification are given
 
- C: unacceptable because others would not understand the classification system
 
- D: unacceptable because this is not the way scientists usually classify sediments
 