PLEASE HELP!! ILL GIVE BRAINLIEST what happened regarding the railroad on may 10th 1869?

A. the central pacific and union pacific railroad companies agreed to lower prices.
B. the central pacific and union pacific railroad companies were denied land grants for expansion.
C. the central pacific and union pacific railroad companies connected a track at promontory point, UT.
D. the central pacific and union pacific railroad companies merged to form a monopoly.

Explanation:

The leaders of the Union Pacific and CPR railroads met at Promontory, Utah on 10 May 1869 and brought a symbolic last spike onto their railway lines. For the first time in U.S. history this allowed transcontinental railway travel.

c

Explanation:

they used a gold spike to celebrate

this means that germany had to pay the allied countries. reparations are/is essentially payment for something that they have done wrong, so after ww1, germany was forced to pay reparations so they could replenish the allied countries resources' that they had lost during the war.

an economic reason that the south needed a reconstruction plan is that plantations, factories, and other businesses were destroyed during the war.