The "endless chain" refers to

d$.$ staying with a prospect until you have a contract. P$.148$

b$.$ asking every prospect to recommend another prospect. P$.148$

a$.$ always selling a new home to the seller. P$.148$

c$.$ prospecting your farm area on a continuous basis. P$.148$

Question $6$

The phrase "centers of influence" refers to

a$.$ properties that set the neighborhood value. P$.150$

d$.$ influential people in the community. P$.150$

b$.$ institutions within an area that influence behavior P$.150$

c$.$ the factor that makes a neighborhood cohesive. P$.150$