Jessica, Peter, Mohammed, Tanya and Becky are growing tomato plants. Each child has three seeds which can grow into plants. The children monitor their plants' growth over two months. At the end of the two months Jessica has one plant which is much taller than her other two plants. Mohammed's three plants are all healthy but much smaller than Jessica's. Peter and Becky did not manage to grow plants from all of their seeds. Tanya only planted one seed, and saved the others for next year. At the end of two months, Tanya had the fewest plants. How many tomato plants did the children grow between them? A 8 B 9 C 11 D 13 E 15​