Question

Read the statement shown below.

"If Jessica is in Grade 8, then Amy is in Grade 9."

Which of these is logically equivalent to the above statement?

A. If Amy is in Grade 9, then Jessica is not in Grade 8.
B.If Amy is not in Grade 9, then Jessica is not in Grade 8.
C.If Jessica is in Grade 8, then Amy cannot be in Grade 9.
D. If Jessica is not in Grade 8, then Amy is in Grade 9.

Answer 1

I also agree,

B. If Amy is not in Grade 9, then Jessica is not in Grade 8.

Answer 2

B is the only reasonable answer, because Amy is only in grade 9 when Jessica is in grade 8.