Multiple Answers: Which of the following represent extrinsic factors that can control the growth of C. botulinum type II in a food? Select all that apply.多项选择题

A

Addition of salt to decrease the water activity to 0.94

B

Generation of an anaerobic environment

C

Refrigeration of food (4 C)

D

Use of vented film packaging to allow oxygen to diffuse into the packaged food

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