Who gave a slogan 'Go back to the Vedas'?

Several considerations prompted the European states and merchants to discover new sea routes to India and South-East Asia in the fifteenth century which one of the following were these considerations?

(A) The old trading routes between the East and the West came under Turkish control after the fall of Constantinople in $1453$, and the Turks were hostile towards the Europeans.

(B) The desire to spread Christianity.

(C) To find markets for European textiles, which were being produced in quantities far more than actual demand.

(D) They wanted to open direct trade relations with the East.

(E) They wanted to break the Arab and Venetian trade monopolies.