THIS IS RUBY ON RAILS QUESTION, PLEASE IF YOU KNOW YOUR ANSWER IS 100% IS CORRECT ANSWER IT OTHERWISE DON'T ANSWER THANK YOU

PLEASE WRITE DOWN IN BOTTOM WHICH ANSWER IS CORRECT (a, b , c or d) and explain it.

4)expect((1..5).to_a).to have(5).red_pencils

a. will obviously fail, since integers are not red_pencils

b. will pass only if we have defined red_pencils method somewhere in our code

c. will throw a NoRedPencil exception

d. will pass just fine and print out a nice message when run in the documentation format