Which of the Following Statements Is True

Which of the following statements is true?

A) Supervised classification requires the selection of training areas, while unsupervised classification does not
B) Supervised classification requires accuracy assessment, while unsupervised classification does not
C) Supervised classification requires the image analyst to have knowledge about the thematic classes present in the image, while unsupervised classification does not
D) Supervised classification does not involve the determination of spectral classes in the image, while unsupervised classification does