Task: Sequential_Recommendation

system
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. 
Below is an instruction that describes a task. After thinking, when you finally reach a conclusion based on the customer's intention, desire and belief, clearly state the BDI thinking process within <think> </think> and then the answer within <answer> </answer> tags.


user 
Instruction: The user's purchase history implies her preferences. Rank the items in the options based on the user's preferences. Output the item that the user is most likely to purchase next from the options.

Input:
Purchase History:
1st: Nalgene Easy Sipper - Designed specifically for your NALGENE 32 Oz wide mouth bottle. Sports & Outdoors. Sports & Fitness. Nalgene.
2nd: TriggerPoint Grid Foam Roller with Free Online Instructional Videos, Original. Sports & Outdoors. Sports & Fitness. Trigger Point Performance.
3rd: ProSource Cork Yoga Blocks (Set of 2). Sports & Outdoors. Sports & Fitness. ProSource.
4th: No Screw Chin Up Station - GoFit Elevated, Multi Use Fitness System. Sports & Outdoors. Sports & Fitness. GoFit.

Options:
A: 14 Mile EF-20A-1 Electronic Visual Distress Signal for Search and Rescue. Sports & Outdoors. Sports & Fitness. North American Survival Systems EF-20A-1.
B: Philips SA32 4 GB Flash Video MP3 Player with FM Radio and 1.8-Inch Color Screen (Black). Electronics. Portable Audio & Video. Philips.
C: KES Over the Sink Multipurpose Roll-Up Dish Drying Rack SUS304 Stainless Steel and Silicon Foldable Dish Rack BLACK 13.4" by 20", PDR6S3451-BK. Home & Kitchen...
D: Memory Card Reader for iPhone, Aukora Lightning USB i-Flash Drive Micro SD TF Card Adapter to Add Extra Storage for iPhone 5/5c/5s/6/6 plus/6s/6s plus iPad...
E: Opteka 650-2600mm High Definition Telephoto Zoom Lens for Canon EOS 7D, 6D, 5D, 5Ds, 1DX, 70D, 60D, 60Da, 50D, 40D, T6s, T6i, T5i, T5, T4i,...
F: Vanguard Spirit Plus Binocular, Black. Electronics. Camera & Photo. Vanguard.
G: Sony SRSX2 Ultra-Portable NFC Bluetooth Wireless Speaker (Red) with Speakerphone. Electronics. Portable Audio & Video. Sony.
H: Azurite Healing Crystal. Home & Kitchen. Home Dcor. CrystalAge.
I: 32 oz Koblenz High Gloss Protective Floor Finish (KO-2005502). Home & Kitchen. Vacuums & Floor Care. Koblenz.
J: New Star Disposable Non Woven Round Chef Hat, 9-Inch, Set of 10. Home & Kitchen. Kitchen & Dining. New Star Foodservice.
K: Augusta Adult Spandex Team Skort. Sports & Outdoors. Sports & Fitness. Augusta Sportswear.
L: nuLOOM Reiko Rug, Blue, 8' x 10'. Home & Kitchen. Home Dcor. nuLOOM.
M: Apple MFi Certified iPhone 7 Car Charger - Skiva PowerFlow (2.4 Amps / 12 Watts) Fastest Car Charger with integrated 3.2ft Lightning Cable for iPhone...
N: House, Home and More Outdoor Carpet Runner - Gray - 3' x 20' - Many Other Sizes to Choose From. Home & Kitchen. Home Dcor...
O: Amscan New Pink Plastic Knife Big Party Pack, 100 Ct. Home & Kitchen. Kitchen & Dining. Amscan.
P: Atlas Waterproof Case for Kindle Fire HDX 8.9" by Incipio, Black. Electronics. Computers & Accessories. Incipio.
Q: Katzco Eye Dropper/Glass Medicine Bottle, Amber Boston Cobalt Blue Round Bottles 1OZ. 12Pack - For Essential Oils, Scents, Travel, Perfume Kitchen, Bath, Cooking, Labs, Laundry,...
R: Thermos Stainless King 16-Ounce Travel Tumbler, Cranberry. Sports & Outdoors. Fan Shop. Thermos.
S: Bormioli Rocco Tempered Stackable 6.75 ounce Juice Glasses - Set of 6. Home & Kitchen. Kitchen & Dining. Bormioli Rocco.
T: ZVac (10 Bags + 4 Filters)Compatible Vacuum Bags/Filters Replacement for Miele FJM Airclean Vacuum Bags.Replaces Part# 7291640.Fits S241-S256i, S290-S291, S300i-S399, S500-S578, S700-S758, S4000-S4999. Home &...


assistant
Answer: R