Magnetic patterns on the ocean floor were puzzling because they A. indicated that all ocean rocks had reversed polarity

B. contradicted the idea of sea-floor spreading.

C. were not symmetrical

D. showed alternating bands of normal and reversed polarity.
will give brainllest

To solve this system of equations by elimination, what operation could be used to eliminate the y-variable and find the value of x? 6x + 5y = 2 4x + 2y = 8 a) subtract 2 times the second equation from 3 times the first equation b) subtract 3 times the second equation from 2 times the first equation c) subtract 5 times the second equation from 2 times the first equation d) subtract 2 times the second equation from 5 times the first equation