It is assumed that Laozi must have lived _________two historical periods in Chinese history known as Spring and Autumn Period and the Warring States Period. (time: 2:44) A: at the junction of B: in the connection C: on the adjunction of D: conjunction

It is assumed that Laozi must have lived _________two historical periods in Chinese history known as Spring and Autumn Period and the Warring States Period. (time: 2:44)‎ ‎‏‎ A: at the junction of B: in the connection C: on the adjunction of D: conjunction