Which paragraph contains the following information?Write the correct letter, A-l, in boxes 17-21 on your answer sheet. NB You may use any letter more than once.

填空题 cookery books providing a sense of stability during periods of unrest

填空题 details in recipes being altered as they were passed on

填空题 knowledge which was in danger of disappearing

填空题 the negative effect on cookery books of a new development

填空题 a period when there was no need for cookery books to be precise