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: RECOTON VS1002 Two Way Audio/Video Switcher, 2-Inputs 1-Output. Electronics. Accessories & Supplies. Recoton.
2nd: Movo Photo LC100-N Lightning & Motion Trigger for Nikon DSLR Cameras. Electronics. Camera & Photo. Movo.

Options:
A: Aurosports Mini Sports Camera 1080P Waterproof Anti-Shake Camcorder Action Video Camera Sport Bike Helmet Action Video Camera DVR AVI – Support 32GB TF Card. Electronics...
B: Kingston Technology ValueRAM 2GB 1333MHz DDR3 Non-ECC CL9 DIMM SR x16 Desktop Memory KVR13N9S6/2. Electronics. Computers & Accessories. Kingston Technology.
C: Libbey 6-Piece Fountain Shoppe Parfait Glass Set, 10-Ounce, Clear. Home & Kitchen. Kitchen & Dining. Libbey.
D: Golden Chef Collection 8 Piece Stainless Steel Non Stick Blades Kitchen Knife Set with Ceramic Peeler Gift Box. Home & Kitchen. Kitchen & Dining. Golden...
E: Hilton Men's Retro Cruiser Bowling Shirt. Sports & Outdoors. Sports & Fitness. Hilton.
F: 1 X Simplicity Freedom Vacuum Belt. Home & Kitchen. Vacuums & Floor Care. Simplicity.
G: Samsung Galaxy Tab (T-Mobile). Electronics. Computers & Accessories. Samsung.
H: Urban Shop Contemporary Plush Microsuede Saucer Chair, Solid, Iris. Home & Kitchen. Furniture. Urban Shop.
I: Deep Tissue Massage Roller by Trademark Innovations. Sports & Outdoors. Sports & Fitness. Trademark Innovations.
J: Fotodiox Lens Mount Adapter - Pentax K Mount (PK) SLR Lens to Micro Four Thirds (MFT, M4/3) Mount Mirrorless Camera Body, with Built-In Aperture Control...
K: TITLE Boxing Single Guard Mouthpiece Single. Sports & Outdoors. Sports & Fitness. Title Boxing.
L: Outdoor Research Men's Rocky Mountain High Gaiters. Sports & Outdoors. Outdoor Recreation. Outdoor Research.
M: United Curtain Mansfield Woven Window Curtain Panel, 50 by 84-Inch, Plum. Home & Kitchen. Home Dcor. United Curtain.
N: H.S. Strut Small Frame Turkey Diaphragm Call 3-Pack by Hunter's Specialties. Sports & Outdoors. Sports & Fitness. Hunters Specialties.
O: Coolie Junction Beer Truck Funny Can, Black. Home & Kitchen. Kitchen & Dining. Coolie Junction.
P: LOFTEK® 7" Outdoor Dome Encloser for Loftek Foscam Wansview Apexis Cctv Surveillance Security Wireless Ip Camera. Electronics. Camera & Photo. LOFTEK.
Q: UbiGear 100 PCS/Pack 12" Inch 12 White Network Cable Cord Wire Tie Ties Strap 60 Lbs Zip Nylon. Electronics. Accessories & Supplies. UbiGear.
R: Nero Trigger - Light and Sound Activated Camera Trigger with Color LCD User Interface. Electronics. Camera & Photo. Nero.
S: Canon EF 40mm f/2.8 STM Pancake Lens (White). Electronics. Camera & Photo. Canon.
T: CafePress Retro Tie-Dyed Peace Sign Wall Clock - Standard Multi-color. Home & Kitchen. Home Dcor. CafePress.


assistant
Answer: R