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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 que ____ cada aplicación y confirmar si funciona.
A. oir
B. ir
C. comprar
D. comprobar

Sagot :

The answer is D comprobar
Explanation : common sense (have a nice day )