A marketing research firm is discussing the possibility of a major project for a real estate company. The research firm has already conducted extensive exploratory research for the project and has been compensated. For the subsequent survey, the top managers in the real estate firm cannot agree on exactly what the specific research objectives should be$.$ What should the marketing research firm do$?$

a decline the project

b$.$ conduct more exploratory research

c$.$ tell the top managers what the research objectives should be and do the project

d$.$ agree to do the subsequent project for a lower cost