Answer:
d. both by deposing the homeowners and others who have been guests
Step-by-step explanation:
Amanda's lawyer can get the information about the homeowner's knowledge both by deposing the homeowners and others who have been guests. According to legal ethics, Amanda's lawyer can find out whether the homeowners knew of the rebar by deposing homeowners and other guests. Sneaking into the property and take pictures is not an option, not for a lawyer nor anybody. He cannot demand the homeowners to produce all of the guests.