Which of these situations is only possible because of contributions from
classical India?

Ineed more information to be honest

There’s no picture, but i’ll give you a few of expeditions. lewis and clark began in 1804, louisiana purchase 1802, james town 1607

Transcontinental railroad was the most effective way to travel.

"d. the battle of quebec began the french and indian war and the attack on fort duquesne ended it." is your answer this is because the war and attack included washington and his people.