For this case we have the following statement:
You will know more after ___________ the classified ad
We must find the correct verb to fill in the blank with the correct conjugation.
The correct verb conjugated for the sentence is:
You answer
We have then:
You will know more after you answer the classified ad
The translation of the sentence in Spanish is:
Sabrás más después de que contestes el anuncio clasificado
Answer:
B. contestes