Answer:
D. They built pagodas as temples where they could pay respect to their ancestors.
Step-by-step explanation:
For those who practice the popular religion of China, after death one cultivates the "conversation with the ancestors", this is because they believe that the ancestors are in an afterlife process. But if for some it's "a private conversation," for others it's "just something you do at festivals."
That is why there are so many festivities in which ancestor worship is celebrated in China. This is the case of the Qingming Festival, a day when the Chinese go to the cemeteries, clean the graves, offer food, tea and wine to the dead, burn incense and papers. Or even the Festival of Hungry Spirits, when offerings are placed at the doorstep and in cemeteries, especially for spirits who are not at peace.