(7) Insulated boxes can help keep warm food warm and cold food cold. (8) Although some foods need to be refrigerated or heated to kill germs that cause food poisoning. What is the best way for the author to combine sentences 7 and 8?
A.
Insulated boxes can help keep warm food warm and cold food cold, although some foods need to be refrigerated or heated to kill germs that cause food poisoning.
B.
Insulated boxes can help keep warm food warm and cold food cold; although some foods need to be refrigerated or heated to kill germs that cause food poisoning.
C.
Insulated boxes can help keep warm food warm and cold food cold, but although some foods need to be refrigerated or heated to kill germs that cause food poisoning.
D.
Insulated boxes can help keep warm food warm and cold food cold although some foods need to be refrigerated or heated to kill germs that cause food poisoning.

B: Insulated boxes can help keep warm food warm and cold food cold; although some foods need to be refrigerated or heated to kill germs that cause food poisoning.

Explanation:

Punctuation is very important in writing. It is very important for better understanding of the writing and it makes writing more appealing to the reader.

Whenever there is a contrast being shown between two clauses in a sentence, we use although. As a rule, there must be a comma before although. If there is another independent clause being introduced as second part of the sentence, we use a semicolon before that. The second part of the sentence “some foods need to be refrigerated or heated to kill germs that cause food poisoning” is an independent clause which can act as standalone sentence. So, option B is the correct option to choose.