With Syllogisms There Are Some Combinations That One Is Unable

Multiple Choice

With syllogisms there are some combinations that one is unable to "draw logically valid conclusions from." Identify which combination of forms would be considered not logically valid.

A) two universal affirmatives statements
B) two particular affirmative statements
C) one universal affirmative and one particular affirmative statement
D) one universal negative statement and one particular affirmative statement