Options:
A.
B.
C.
D.
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Earlier discussion
4 older comments kept for context.
ifechukwu
The ans should b A cos half life is used yo create a new element after disintegration.
The question say element not object ( polymerization of elements)
Samuel
The answer is nt B, the correct answer is C. Because we use half life to knw how long a radioactive element lasts
Oluwaseun Adeyemi
Scientists can use the half-life of carbon-14 for instance to determine the approximate age of organic objects.
Atayi nation
I think the answer was a