Answer:
The height of A is 900
Explanation: Beside A, there is a number which explains what the height is so the answer is A.
Liquid petrol does not ignite spontaneously when exposed to the air because there is not enough molecules that contains energy to reach the activation energy. As a result, the reaction cannot proceed and a supply of energy should be added for the reaction to occur.
That would be <span>Johannes Gutenberg a German inventor from the 1400's </span>
