Which allowed scientists to determine that Earth was at least 4.3 billion years old? A.magnetic field surrounding zircon B.the radioactive decay of uranium to lead C.the electrical conductivity of uranium ions D.chemical reactivity of zircon ions

1 answer
Question:

Which allowed scientists to determine that Earth was at least 4.3 billion years old?
A.magnetic field surrounding zircon
B.the radioactive decay of uranium to lead
C.the electrical conductivity of uranium ions
D.chemical reactivity of zircon ions

Answers

Answer:I believe e it is B Explanation:hope it is correct ;)

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