Answer:
Explanation:
On June 25, 1950, the Korean War began when some 75,000 soldiers from the North Korean People's Army poured across the 38th parallel, the boundary between the Soviet-backed Democratic People's Republic of Korea to the north and the pro-Western Republic of Korea to the south.
The answer is C. Caracalla. Hope this helped.
The invention of the telegraph and telephone helped improve the standard in the United States by making the lives of the citizens more easier and efficient. The telegraph was a machine that send messages to places from long distances. The telephone is a machine that transmits sound to another device. The telegraph and telephone helped improve the living standards by helping people send messages and audio to places from long distances, so the person doesn't have to send a letter that could take days for the person to receive. It made the lives of the people in the United States a lot easier.
tan A should be the corner try work out work out:

first and then add all the others (B=90)
Explanation:
A and C should be the same
The answer to this question is B