Which sentence correctly uses commas to separate items in a list?
1.the deacidification process preserves pages by neutralizing acid with magnesium oxide, raising the ph level of the paper, and, minimizing the alkaline reserve.
2,the deacidification process preserves pages by neutralizing acid with magnesium oxide, raising the ph level of the paper and, minimizing the alkaline reserve.
3,the deacidification process preserves pages by neutralizing acid with magnesium oxide, raising the ph level of the paper, and minimizing the alkaline reserve.
4,the deacidification process preserves pages by neutralizing acid with magnesium oxide, raising the ph level of the paper and minimizing the alkaline reserve.

The sentence that uses commas correctly is 3. The deacidification process preserves pages by neutralizing acid with magnesium oxide, raising the pH level of the paper, and minimizing the alkaline reserve.

Explanation:

In English, when we need to separate items in a list, we place a comma between each one of them. The last item in the list is usually introduced by the coordinating conjunction "and". We still need to place a comma before "and", but we should not place one after it. Let's study a simple example:

- I asked Jane to buy apples, oranges, grapes, and bananas.

The same should happen in the sentence provided in the question. We have three items to separate:

1. neutralizing acid with magnesium oxide;

2. raising the pH level of the paper;

3. minimizing the alkaline reserve.

In the sentence, those items must have a comma between them. The last one is introduced by "and", having a comma before but not after it. Therefore:

3. The deacidification process preserves pages by neutralizing acid with magnesium oxide, raising the pH level of the paper, and minimizing the alkaline reserve.

for me i cant do homework without music, so, i guess i would say faster with it, than without it. for me at least.