Name one thing you know about atoms and molecules.

They are found in every living thing.

Explanation:

Every living thing consists of atoms and molecules.

Explanation:

Berlin blockade was an international crisis that arose when  soviet Union blocked road, railway and canal access to Berlin to halt western Allies access to the sectors of Berlin that was under their control.  

The crisis was tackled by Britain and US, they launched massive airlift of water, medicine and water to Berlin. They kept supplying it for more than one year and sustained over 2 million people.  The blockade lasted from June 24, 1948 and lasted till May 12, 1949.

The blockade occurred during cold war when none of the two superpowers wanted to use military force against each other, so (D) is the correct answer.