Which statements are true(choose all that applay)
a,is-a relationships always rely on inherritance.
b,is-a relationships always rely on instance variables.
c,is-a relationships always require at least two class types.
d,is-a relationships always rely on
Polymorphism.
e,is-a relationships always tighthy coupled.
the answer is a,c and d.
I think there is only c is right.
Can anyone explain this.
thanks in advance.