The correct answer is B) Found within the thrust bearing cap or cover are extended protrusions to position the thrust shoe segments and maintain minimum clearance. The thrust bearing assembly in marine applications is designed to prevent the thrust bearing blocks from rotating within the housing. This is typically achieved through the use of extended protrusions or positioning features within the thrust bearing cap or cover. These protrusions help secure the thrust shoe segments in place and maintain the necessary minimum clearance, preventing the bearing blocks from rotating freely. The other answer choices are incorrect because: A) The weight of the bearing blocks alone is not sufficient to prevent rotation; C) The thrust bearing assembly is designed to transmit axial forces, not allow for rotation; and D) The thrust shoes are not typically dovetailed into the collar in this type of bearing arrangement.