Statements
All calls are mails.
Some mails are posts.
Some posts are letters.
Conclusions
I. All mails are calls.
II. No call is a letter.

A

if both the Conclusion I and Conclusion II follow

B

if either Conclusion I or Conclusion II follows

C

if neither Conclusion I nor Conclusion 11 follows

D

if only Conclusion I follows

E

if only Conclusion II follows