Determine​ which, if​ any, of the three statements are equivalent.
​a) The shirts are on sale and the necklace is on sale.
​b) If the shirts are on sale then the necklace is not on sale.
​c) It is false that the shirts are not on sale or the necklace is not on sale.
a) Statements​ a), b), and​ c) are equivalent.
b) Statements​ b) and​ c) are equivalent.
c) Statements​ a) and​ b) are equivalent.
d) Statements​ a) and​ c) are equivalent.
e) None of the statements are equivalent.