La oracion pretende: eucerin crema antiestrias un aumento del 28,4%en la elasticidad y firmeza de la piel A) mostrar los resultados de un estudio clinico B) presenta una opinion objetiva para su aceptacion general C) respalda a traves de datos comprobables la eficacia del producto D) ninguna de las anteriores.

C) respalda a traves de datos comprobables la eficacia del producto

Explanation:

The underlined part is "28,4%en la elasticidad y firmeza de la piel" or "a 28.4% increase in elasticity and  firmness of the skin".

In the context, the sentence is talking about a anti stretch cream called as EUCERIN ANTI-STRETCH CREAM. It says that if women use the cream for about eight weeks, they will get a good skin tolerance and it is clinically proven that there is increase in elasticity and firmness of the skin by about 28.4% after using this anti-stretch cream.

Thus this shows the effectiveness of the cream and they have also provided a verifiable data along with it which is verified and proven in chemical testing of the cream.

c holding free elections