Given the Following Sorites: All T Are D

Multiple Choice

Given the following sorites: All T are D.
No D are R.
All A are R.
Some K are A.
Some K are not T.
This sorites is:

A) Valid because no rules are broken.
B) Invalid because the subject term of the conclusion is not distributed.
C) Invalid because it has more than two universal premises.
D) Invalid because one of the middle terms is not distributed.
E) Invalid because it draws a negative conclusion from three affirmative premises.