i might be going out on a limb but... maybe it's because it's about 4 teenagers who are struggling through poverty and there women?
Answer:
A buried treasure.
Explanation:
Dredging is the process of excavating something in water. So, only a buried treasure would be under or in water.
The error in this sentence is a A) pronoun-antecedent voice agreement error. But it should be noted that this has become more standard usage in common dialogue.
C. "My knees are killing me," he complained after the run.