(1) In 2001, a new way to grow watermelons made national news. (2) Farmers in the Zentsuji area of Japan developed a better way to grow them. (3) The farmers placed small watermelons in glass boxes. (4) A watermelon can be considered a fruit or a vegetable. (5) As each watermelon grew, it took the shape of the box. (6) These square melons are easier to stack, store, and ship. (7) For example, the square watermelons fit perfectly in Japanese refrigerators. (8) Square watermelons also result in zero wasted space in shipping trucks. (9) Sadly, the square melons are much more costly than round melons. (10) Japanese farmers have molded watermelons into hearts and pyramids as well . (11) Some watermelons even have a face, complete with a pair of eyeglasses, a nose, and a smile. (12) However, these new shapes do not have the same advantages that square watermelons do. (13) The new shapes are also more expensive than the square watermelon. Which piece of evidence could the author add to support the statement "The new shapes are also more expensive than the square watermelon"? Heart and pyramid-shaped watermelons have become very popular. OB. Pyramid-shaped watermelons are in high demand. A. Oc. The cost of a heart-shaped watermelon is twice the cost of a square one. D. Square and pyramid-shaped watermelons can be stored in different ways.​