Pandit Nehru who had been assuring the Kashmiris to give them their right to self determination went back on his promise when?

(A) Pathan tribesmen entered into the valley and attacked the Indian forces.
(B) Pakistan joined SEATO and CENTO pacts.
(C) Realised about massive natural wealth of the area.
(D) he realised the strategic significance of the valley for Indian Defence system.