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: Rank the items in options and predict the user's next purchase from the listed options by analyzing her historical purchases.

Input:
Purchase History:
1st: CW-X Women's Muscle Support Performx Full Length Compression Tight. Sports & Outdoors. Sports & Fitness. CW-X.
2nd: FuelBelt Super Stretch Race Waist Pack, Black, One Size. Sports & Outdoors. Sports & Fitness. FuelBelt.
3rd: CW-X Women's Insulator Stabilyx Tights. Sports & Outdoors. Sports & Fitness. CW-X.

Options:
A: Goldsource STU-750 Voltage Converter: AC 110V / 220V 750W Step-up and Step-down AC Voltage Transformer - Maximum Load Capacity (MLC): 750 Watts. Electronics. Accessories &...
B: Topro Dome Bed King Canopy Netting Insect Fly Mosquito Net. Home & Kitchen. Bedding. Topro.
C: AccuPower IQ338 Fast Charger and Analyzer Tester for Li-ion NiMH NICd Rechargeable Batteries. Electronics. Accessories & Supplies. AccuPower.
D: Shark Ceramic Salt and Pepper Shakers Novelty Gag Gift. Home & Kitchen. Kitchen & Dining. Accoutrements.
E: Kastar NB-4L Lithium-Ion Replacement Battery (2 Packs) for Canon PowerShot SD780 IS SD940 IS SD960 IS SD970 IS SD1000 SD1100 IS SD1400 IS TX1, PowerShot...
F: Rhode Island Novelty Wooden Boomerang Colors May Vary. Sports & Outdoors. Sports & Fitness. Rhode Island Novelty.
G: Under Armour Men's ColdGear Armour Twist Compression Leggings. Sports & Outdoors. Sports & Fitness. Under Armour.
H: InterDesign Blumz Kitchen Sink Protector Mat - Large, Clear. Home & Kitchen. Kitchen & Dining. InterDesign.
I: Orange Pi PC Single Board Computer Quad Core ARM Cortex-A7 1GB DDR3 4K Decode. Electronics. Computers & Accessories. Orange Pi.
J: Fm Transmitter, Keedox Car Radio Transmitter Car kit with 3.5mm Aux Audio Input, Car Charger Adapter for Apple iPhone 6s Plus, 6s, Samsung and More...
K: Scorpion Billiard Glove. Sports & Outdoors. Sports & Fitness. Scorpion.
L: Griffin Technology 9502-CLK30 AirClick RF Remote Control with Dock Connector for iPod. Electronics. Portable Audio & Video. Griffin Technology.
M: Microfiber Cloth Screen Cleaner - Perfect Cleaning Cloth for Computers, Tablets, Cellphones, Camera Lenses, Eye Glasses and All Other Delicate Surfaces. (6" X 7", 4-Grey,...
N: Acer Aspire E 15 E5-575G-76YK 15.6-inch Full HD Notebook (Intel Core i7, NVIDIA 940MX, 8 GB DDR4, 256GB SSD, Windows 10 Home 64-bit Edition),Black. Electronics...
O: Boker Wt Lanyard Skull (Black/Black).  Bker.
P: Kreate 8" Acrylic Dessert Plates - Set of 4 - Triangular Vortex Break-Resistant Plastic - Aqua Blue Accent - BPA Free. Home & Kitchen. Kitchen...
Q: Shower-Mate S4 Water Resistant Built-in Hands-Free Bluetooth Portable Shower Speaker for Smartphones and Tablets - Yellow. Electronics. Portable Audio & Video. Shower-Mate.
R: Fitbit Surge Fitness Superwatch, Black, Small (US Version). Sports & Outdoors. Sports & Fitness. Fitbit.
S: Mohawk Home Strata Fusion Rug, 2'x5', Aqua. Home & Kitchen. Home Dcor. Mohawk Home.
T: SF-290 Floor Steam Mop and Multi-Purpose Steamer. Home & Kitchen. Vacuums & Floor Care. Steamfast.


assistant
Answer: R