Consider the following relevance diagram: How many of the following operations can you (validly) perform on this relevance diagram without anyfurther manipulation! I. Reverse arrow between A and B....

Consider the following relevance diagram:

How many of the following operations can you (validly) perform on this relevance diagram without anyfurther manipulation!

I. Reverse arrow between A and B.

II. Reverse arrow between D and F.

III. Add arrow from G to A.

IV. Add arrow from B to C.

a. 0 c. 2

b. 1 d. 3