Choice
in 1896 samuel p. langley wrote the following quote in response to which of the following form of energy? "the rivers are clean again, harbor shows only white sails, and england 'black country' is green once more"

a) nuclear energy
b) coal
c) petroleum
d) wood

the correct answer option is: weapons.

explanation:

tensions rose as the two opposing superpowers competed for 'weapons'.

referring to the cold war (1945-1991), the two superpowers, usa and ussr, experienced a phase of struggle and conflict with each other. these two superpowers considered each other as a threat to their survival and thus opted for policies to strengthen their positions.

the two superpowers never went to war with each other directly but competed for weapons to preserve their positions.