Sorites 1D Given the Following Sorites

Multiple Choice

Sorites 1D
Given the following sorites:
Some S are R.
No B are S.
All R are H.
All M are B.

Some H are not M.
-For Sorites 1D, the correct answer is:

A) Invalid.
B) Sound.
C) Valid.
D) Unsound.
E) Cogent.