Read the excerpt below and answer the question.
on the edge of a small cape that marked the side of the bay away from the promontory was a loose scatter of rocks
choose the best definition for the word promontory as it is used in this excerpt from doris lessing’s "through the tunnel."
a. a smooth sandy area on a beach
b. careful not to fall and hurt oneself
c. required for swimming in the ocean
d. a piece of land projecting into water