1. The references to “From the Baltic, south” (lines 2-3) and “Farther south"
(line 4) serve primarily to
(A) illustrate the geographic reach of the Soviet empire.
(B) explain where the Berlin Wall begins and ends.
(C) make a connection between Germany and other European countries.
(D) demonstrate Reagan's knowledge of European geography.

you need to include the text. we have no idea what you are referring to

i’m pretty sure it is the second

the correct answer is a.

since in the sentence the word beacon is used as "guide".

lighthouse:

high tower located on the coasts and ports that emits a powerful light at intervals to guide navigators at night.

luminous tower.

beacon synonyms as a guide: lighthouse, north, tower