Answer:
Answer is option b, i.e. Passion for his invention.
Step-by-step explanation:
Roland has almost all the qualities of a successful entrepreneur which includes an innovative mindset, ability to identify new opportunities, but he lacks in being passionate about what he desires to achieve. To start something new and follow one's dream one has to be passionate enough to be consistent and patient. Passion without patience is merely a dream which cannot be realized in true form. Hence, instead of quitting on what Roland had started, he should have searched for some more ideas to influence various agriculture companies.