Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to tell if bacon is bad [title] Check the expiry date on the bacon packet. [step] If the " use by " date has expired, then that bacon is unsafe to use. Always use bacon within seven days of purchase (" sell by ") or by the " use by " date listed by the manufacturer.

Ending1: You can also safely thaw and cook the bacon within four months of freezing bacon. [substeps] Take care not to confuse the " sell by " and " use by " dates. Ending2: [substeps] The expiry date is on the packaging. If it is written before the expiry date, then the bacon is bad. Ending3: Furthermore, the date on the packet may indicate how the bacon was sliced prior to the expiry date. [substeps] Bacon contains a significant amount of fat during cooking. Ending4: If the expiry date is frequently displayed under the " use by " date, then you probably need to start over. [substeps] If the expiry date never shows on the packet, that means that the bacon has gone bad.

Answer format: ending1/ending2/ending3/ending4