Guessing at what word the question is asking about here. I'd say B - obstinacy means being stubborn or inflexible, which doesn't apply here.
we should have like a wrist tracker that tracks both sleep and activity which will help a lot with knowing people schedule
I think: it creates a rhythmic pattern..
Answer:
The factors which contribute towards success paragraph:
Without determination you can't reach success. Having a never say die attitude, It will give you perseverance and a positive attitude. Success is all about hardwork and your devotion to your goal. Dedication towards success may help you succeed.
Explanation: