What has 4 leg in the morning,2 in the afternoon and 3 in the evening?

A human being

4 legs when : crawling as a child

2 legs when : walking as an Adult

3 legs when : walking with a stick as an old man

A human being

Explanation:  This is because in the morning when a baby is on 4 legs crawling in the afternoon children or adults walk using 2 legs and in the evening an elderly person using their legs and a walking stick to help him/her walking which counts as 3

1, 4, and 5 are all conflicts

the answer is   c the cold war