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: Given the products the user has purchased in history, rank the items in the listed options and output the item that the user is most likely to purchase next. Answer from one of the options.

Input:
Purchase History:
1st: Vandor 18151 Hello Kitty 18 oz Acrylic Travel Cup with Lid and Straw, Pink. Home & Kitchen. Kitchen & Dining. Vandor.
2nd: Kinetic Classicor Series Wrought-Iron Oval Pot Rack 12021. Home & Kitchen. Kitchen & Dining. Kinetic.
3rd: Quantum Storage 4-Shelf Wire Shelving Unit, 300 lb. Load Capacity per Shelf, 72" H x 48" W x 24" D, Chrome Finish. Home & Kitchen...

Options:
A: VENTECH 4 Pack CCTV Security Dome Camera Color 1000tvl 960H Analog CMOS 36 led IR-Cut Night Vision Infrared Home Surveillance 3.6mm Lens Indoor 12v Audio...
B: 3D Modern Contemporary Quiet Wall Clock - 13-inch Round Pink. Home & Kitchen. Home Dcor. JustNile.
C: 100% Silicone Treadmill Belt Lubricant - Specifically Formualted for Exercise Treadmills - Extend the Life of Your Treadmill Machine and Belt Attachment. Sports & Outdoors...
D: TravelSource - 2-Person Stainless-Steel Camping Eating Utensils Set - Portable Mess Kit Set + Case & Bottle Opener. Sports & Outdoors. Outdoor Recreation. TravelSource.
E: COD Bluetooth Keyboard Tablet Stand Leather Case for Samsung Galaxy Note 10.1 2014 Edition (Black/Brown). Electronics. Computers & Accessories. COD(TM).
F: Extra Large Hard Shell Case For Garmin, TomTom, Mio GPS with 4.3-Inch Screen. Electronics. GPS, Finders & Accessories. i.Trek.
G: Lumsing Lightning to USB Cable Apple Certified Sync and Charging Cord(3.3 Feet/1M) with Ultra Compact Connector Head for iPhone, iPod and iPad(Blue). Electronics. Computers &...
H: Gexco Tennis Ball Saver - Keep Tennis Balls Fresh And Bouncing Like New. Sports & Outdoors. Sports & Fitness. Gexco.
I: VicoVation Vico Opia2 2K Ultra-HD 1440p HDR Dashcam. Electronics. Car & Vehicle Electronics. VicoVation.
J: Carlisle Expedition Fiberglass Touring Kayak Paddle, Gold. Sports & Outdoors. Outdoor Recreation. Carlisle.
K: Sony Action Camera Accessory Kit. Electronics. Camera & Photo. Sony.
L: Tmvel Masti Ultra Portable Wireless Bluetooth Speaker with Built-In Speakerphone and 10 Hour Rechargeable Battery - Retail Packaging - Black. Electronics. Portable Audio & Video...
M: SPRI Lifting Hooks (Pair). Sports & Outdoors. Sports & Fitness. SPRI.
N: Plano 1354-02 -by Rack System 3500 Size Tackle Box. Sports & Outdoors. Sports & Fitness. Plano.
O: Kay Dee Designs 3-Piece Cotton Flour Sack Towel Set, 26 by 26-Inch, Belle Maison. Home & Kitchen. Kitchen & Dining. Kay Dee.
P: DII Cotton Jacquard Dish Towels, 20x28" Set of 3, Decorative Tea Towels for Everyday Kitchen Cooking and Baking-Walk In The Woods. Home & Kitchen. Kitchen...
Q: 6 Piece GE LED 12" Window Candles: Two Function Steady On and Flickering - 2012 Version. Home & Kitchen. Home Dcor. GE.
R: Vandor Marvel Black Widow 12-Ounce Ceramic Mug (26561). Home & Kitchen. Kitchen & Dining. Vandor.
S: BCP Pack of 20 Orange Citrus Plastic Opener Peelers. Home & Kitchen. Kitchen & Dining. BCP.
T: Mario Kart - Nintendo Gaming Poster (Size: 24" x 36"). Home & Kitchen. Wall Art. Posterstoponline.


assistant
Answer: R