Mrs. Read lives in a small village. Her hu

问题：

Mrs. Read lives in a small village. Her husband is dead, but she has one son named Jack. He is twenty-one. In the past, he worked in the shop in the village and lived with his mother, but then he found a better job in a far away town named Greensea and moved to live there. But Mrs. Read was unhappy about it.
Last Sunday, Mrs. Read was very angry with Jack. She got on a train and went to her son’s house in Greeasea. Then she said to him, "Jack, why do you never telephone me"
Jack laughed, "But, Mum, you haven’t got a telephone."
"No," she answered, "I haven’t, but you have got one!\

Last Sunday, Mrs. Read went to Greensea ______ .

A. on foot

B. by train

C. by air