The suez canal connected the mediterranean sea and

the caspian sea.
the red sea.
the atlantic ocean.
the persian gulf.

the Red Sea.

Explanation:

The Suez Canal is an ocean level conduit in Egypt, associating the Mediterranean Sea to the Red Sea through the Isthmus of Suez. Developed by the Suez Canal Company somewhere in the range of 1859 and 1869, it was authoritatively opened on 17 November 1869. The waterway offers watercraft a more straightforward course between the North Atlantic and northern Indian seas by means of the Mediterranean and Red oceans, therefore maintaining a strategic distance from the South Atlantic and southern Indian seas and in this way lessening the voyage separate from the Arabian Sea to, for instance, London by roughly 8,900 kilometers (5,500 mi). It extends from the northern end of Port Said toward the southern end of Port Tewfik at the city of Suez.

i believe the answer is:

-   william jennings bryan is a democrat while mckinley was a republican

at that time, the segment of population that choose for democratic party were the voters with low economic background and vice versa

- william jennings has support of populists and wants to have inflation to farmers while mckinley has support of bankers and businessmen , doesn't want inflation

the fixed value of gold make the large business able to stack up their gold without   being worried that it would devaluated.

- william jennings supported the silver standard while mckinley supported the gold standard

according to jenning, using other metal beside gold could the poor people to have more purchasing power and them advance in the society.