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Lee y escoge la mejor opción para completar la frase. Read and choose the best option that completes the sentence.

Antes de vender el teléfono celular al público, los creadores tuvieron _____ cada aplicación y confirmar si funciona.

A. oir
B. ir
C. comprar
D. comprobar


Sagot :

D because you test it before selling something. I hope is correct :D
the answer is D comprobar