Anyone know the answer to this? if u get it right i’ll mark brainliest

A

Explanation:

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During a chemical reaction, the total mass of material does not change

Explanation:

First, a hypothesis is not a question, so the second option is wrong. A hypothesis is a statement that uses evidence to create a conclusion. The third option states their opinion without anything to back it up. The last option is also their opinion. The first option says during, as if it's already been tested. So, it's safe to assume this statement has already been tested because they already came to a conclusion, which is the total mass of material does not change.

explanation:

japan participated in world war i from 1914 to 1918 in an alliance with entente powers and played an important role in securing the sea lanes in the west pacific and indian oceans against the imperial german navy as the member of the allies.

could you give me the options ?