Final answer:
The appropriate sterilization methods for non-woven cellulosic wrap and certain containers are ethylene oxide and radiation sterilization. Ethylene oxide can sterilize heat-sensitive items packaged in plastic, while ionizing radiation, such as gamma irradiation, is effective for sterilizing packaged materials.
Step-by-step explanation:
The suitable sterilization method for non-woven cellulosic wrap (paper) and certain containers is either ethylene oxide (a) or radiation sterilization (b). Ethylene oxide is a gaseous sterilization method that is highly penetrating and suitable for sterilizing items that are sensitive to heat, such as those packaged in plastic. Due to being a form of cold sterilization, it can also sterilize items that are heat-sensitive, but it requires careful handling because of its carcinogenic and explosive properties. On the other hand, ionizing radiation, including gamma irradiation, can effectively sterilize both heat-sensitive and packaged materials, such as non-woven cellulosic wraps and certain containers. It is quite efficient as it can easily penetrate through paper and plastic items.