What were the two purposes for the forts on the oregon trail?

The forts on the Oregon trail served these two purposes:

1) To safeguard and supply emigrant wagon and trains.
2) Served as a major link in the Pony Express, Overland Stage and transcontinental telegraph systems and also served as an operation base for the High Plains Indian Wars.

the answer is d. give brainliest if right.

ps is this 7th grade civics?

explanation:

hitler's  "rise" can be considered to have ended in march 1933, after the reichstag adopted the enabling act of 1933 in that month. president paul von hindenburg had already appointedhitler  as chancellor on 30 january 1933 after a series of parliamentary elections and associated backroom intrigues.