What factors can lead to the development of mixed economies?

A mixed economy means that part of an economy is managed by the government while part of it is left with the free market. Its development factors involve allowing private enterprise to run most of the business and then in the later part government can come in for providing public services or regulation of private business etc. 

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.

answer: my personal opinion is the black spider because he is more powerful than spiderman.