Task: Sentiment_Analysis
user: 

 You are a helpful assistant. The assistant first thinks about the reasoning process in the mind by using Belief-Desire-Intention (BDI) framework and then provides the user with the answer. The reasoning process and answer are enclosed within <think> </think> and <answer> </answer> tags, respectively.  /nFor the BDI reasoning process, (1) Based on the User Review, starting with "customer believes", list the user's beliefs; then, based on the User Review and the definition of Reiss's 16 basic desires theory, list the user's desires; next, based on the listed beliefs, desires and User Review, starting with "customer intends", list the intentions; (2) Finally, based on the generated beliefs, desires and intentions, construct logically BDI reasoning process, and select the correct answer based on the BDI reasoning process and input. /nThe definition of Reiss's 16 Basic Desires Theory: 1. Acceptance - the need to be appreciated 2. Curiosity, the need to gain knowledge 3. Eating, the need for food 4. Family, the need to take care of one’s offspring 5. Honor, the need to be faithful to the customary values of an individual’s ethnic group, family or clan 6. Idealism, the need for social justice 7. Independence, the need to be distinct and self-reliant 8. Order, the need for prepared, established, and conventional environments 9. Physical activity, the need for work out of the body 10. Power, the need for control of will 11. Romance, the need for mating or sex 12. Saving, the need to accumulate something 13. Social contact, the need for relationship with others 14. Social status, the need for social significance 15. Tranquility, the need to be secure and protected 16. Vengeance, the need to strike back against another person/nNow the user gives an instruction that describes a task and ask you write a response that appropriately completes the request. After thinking, when you finally reach a conclusion, clearly state the BDI thinking process within <think> </think> firstly and then the answer (i.e., answer only letters in options) within <answer> </answer> tags.
Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
User Review: I traded up from a Canon Digital Elph (which was a real nightmare to use and had horrible resolution) to the Nikon CP 5000. The two cameras are like night and day. It is true thast the Nikon is 3 times the price of the Elph. However, the Nikon is easy to operate and the picture quality is super fine. The design of the camera body is great because it is very closely related to what you are used to holding when you use a conventional camera (a comfort I find lacking in many digital camera's oh-so-desperate to be futuristic designs). There is a right hand rubber grip that makes for a very firm grasp. I got this camera a few days before I left for a trip to Lisbon and I returned with great pictures and didn't spend a lot of time scratching my head.
It is an expensive piece of machinery and with the rapidly evolving technology of digital cameras the prices tend to drop fast, so give it a lot of thought.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative


<think>
Answer: B: positive