What was the main reason why Alfred Wegener's theory about the movement of the continents was dismissed in 1912?

His theory explained the Earth was expanding as the plates moved

He didn't know about plate tectonics to explain how the plates moved

His map of the ocean floor did not support his theory

His theory was the first to observe the continents fit together

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.