Answer: c) Prompting Dr. Jekyll to ask Mr. Utterson to promise that Mr. Hyde will receive what is left to him in the will.
Step-by-step explanation: In this excerpt we can see that Dr. Jekyll has named Mr. Hyde as his heir but his Lawyer (Mr. Utterson) disagrees because he has investigated some things about Mr. Hyde and he has realized that he is a terrible person, without listening to his lawyer, Dr. Jekyll insists in his decision and said "This is a matter I thought we had agreed to drop”, this later leads into Dr. Jekyll asking Mr. Utterson to promise that Mr. Hyde will receive what he has left him on the will.