a) This statement is correct
Explanation
Alliances with smaller countries enabled the superpowers to mobilise troops and launch weapons against their adversaries. In this regard, we may cite the example of how Pakistan became a member of CENTO and SEATO, and was used as a base to counter Soviet threat.
b) This statement is correct
Explanation
It helped the superpowers to spread their ideological influence among the member countries. We may cite the example of how the Western alliance, which was headed by the US, represented the liberal capitalist ideology and how the Eastern alliance, led by the Soviet Union, represented the socialist and communist ideology.
c) This statement is correct
Explanation
Alliances were formed to enhance a state’s own capabilities against others. Alliances are formed on the notion of collective security, where an attack on one member country is considered as an attack on all the members of the alliance.
d) This statement is wrong.
Explanation
Both the blocs realised the gravity of the situation and rather practised restraint, in order to prevent the outbreak of another war, particularly nuclear war. Thus, they entered into a series of negotiations and treaties to prevent any misunderstanding and engaged in arms control. The NPT could be cited as an example where nuclear powers restricted other countries from acquiring nuclear arsenals.