WHY KRISHNA ACCEPTED NANDHA & YASODHA AS HIS PARENTS?

Cc.Madhya.8.77 Says:

nandah kim akarod brahman
sreya evam mahodayam
yasoda va maha-bhaga
papau yasyah stanam harih

Sri Sukadeva Gosvami himself is saying this: "What austerities, what punya, has Nanda Baba performed that he became the father of Krsna? He was always ordering Krsna, 'Bring my shoes.' 'Go and do this and that.' Yasoda va maha-bhaga. Mahabhagya Yasoda is so fortunate that she was able to give her breast-milk to Krsna."

Sukadeva Gosvami is speaking in wonder: 

"What did he do?" The answer is that he never did anything. 

Nanda Baba and Yasoda Maiya are Krsna's eternal father and mother. 

The Supreme Lord Krsna actually has no father and mother, but through love and affection they have become the transcendental and eternal father and mother of Krsna. 

Their love is so high that Krsna accepts, "Nanda Baba is My father and Yasoda Maiya is My mother."