What part do you need help with?
D because yeah it says i need 20 characters
Around the world and beginning in the 1830s in the u.s. the growth accelerated "during the <span>industrial Revolution". This revolution made the incomes of most social classes except the elite soar in ways they had not before, creating upward mobility.</span>
D. It seems like the most reasonable answer. And there were also trading routes established during those times.
Answer:
by sending thier army or trops to protect the panama
