How did “the irresistible demands of commerce"
influence the building of the bridge?

The correct answer is: People wanted the bridge built because it would be good for business.

Explanation:

In the excerpt, the author clearly states that the people wanted to build a bridge because they considered it would be good for business. We can also conclude that from the following sentence: The irresistible demands of commerce enforced these hard conditions.

As we can notice, this irresistible need of commerce enforced the hard conditions for the construction of the bridge, and people doubted the construction would begin at the earnest.

she is later raised by him and his wife, madame valmonde, who sees her as gift from god, as the couple cannot have their own children. later, desiree falls in love with a wealthy man, armand aubigny, and they get married.

i may be wrong but i think your answer is flashback