Volcanic rock shows that some layers have magnetic fields that are aligned opposite to Earth’s. This evidence BEST fits which hypothesis?

Question

Responses
A Earth's rotation has reversed in the past.Earth's rotation has reversed in the past.
B Earth's magnetic field has reversed in the past.
Earth's magnetic field has reversed in the past.
C Earth did not have a magnetic field until recently.Earth did not have a magnetic field until recently.
D Earth's magnetic field has always had the same orientation.

Answer 1

The best response to the evidence of volcanic rock layers showing that some have magnetic fields aligned opposite to Earth’s is:

B) Earth's magnetic field has reversed in the past.

This is supported by the phenomenon known as "magnetic reversal," where the Earth's magnetic field has changed direction over geological time, leading to layers of rock with different magnetic orientations being formed.