I believe it's 'go on the Lewis and Clark Expedition.'
The answer is D- natural gas
<span> 30% growth in GNP between 1922-1928
Automobile and automobile-related industries were booming and employed almost 4 million workers.
Unemployment was low between 1923-1929. Only about 3%.\
High purchasing power. People were spending money with their higher wages.</span>
Identify if what’s direct ?
