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: Uniden Weather Proof Video Surveillance Camera, White (GC45W). Electronics. Camera & Photo. Uniden.
2nd: Acoustic Research AW822 900 Mhz Outdoor Wireless Speaker (Single, Brown) (Discontinued by Manufacturer). Electronics. Home Audio. Acoustic Research.
3rd: Roku Streaming Stick (3500R) (2014 Model). Electronics. Television & Video. Roku.
4th: Mounting Dream MD2378 TV Wall Mount Bracket with Full Motion Articulating Arm for Most 26-55 Inch LED, LCD Flat Screen TV up to VESA 400x400mm...

Options:
A: Elixir outdoor Instant Tent Easy to set up in 6 sec for 6 person, Camping, Hiking , Beach Sports. Sports & Outdoors. Outdoor Recreation. Elixir...
B: ROCKTECH Sport Portable Wireless Bluetooth 4.0 Speakers,Water Resistant with 2 X 3W Stero,Enhanced Bass,Built in Mic and 12H Playtime,Pairs with All Bluetooth Devices(Black). Electronics. Portable...
C: CM6350 Countertop Coffee System in Black. Home & Kitchen. Kitchen & Dining. Miele.
D: GenuineLogitech Part - Logitech Receiver Extender Cable, Stand, Extension Replacement, USB. Electronics. Computers & Accessories. Logitech.
E: SPRI Exercise Dice. Sports & Outdoors. Sports & Fitness. SPRI.
F: Acer Aspire E1-572G E1-157 E3-111 E1-571 E1-522 E1-531 (All Models) Laptop AC Adapter Charger Power Cord. Electronics. Computers & Accessories. Delta.
G: Olympus C-770 Ultra Zoom 4MP Digital Camera with 10x Optical Zoom. Electronics. Camera & Photo. Olympus.
H: Men's Silicone Wedding Ring Band With Mesh Bag,Black,Size 12.
I: Fintie iPad Pro 12.9 (1st Gen 2015) Case - Premium PU Leather Folio Case with Smart Cover Auto Sleep/Wake Feature and Built-in Cards Slots for...
J: Ecandy Smallest Mini Wireless Stereo Bluetooth Headphone For Smart Phone Laptop, Mini Earbud Headsets For Iphone 4 4S 5 5S Samsung Galaxy S4 S5 i9600...
K: National Geographic NG A2560RC Rain cover for Medium and Slim Bags. Electronics. Camera & Photo. National Geographic.
L: Ultimate Arms Gear UAG-MWS38529 Mag Wraps Magwell Slaps Stealth Black DTOM Don't Tread On Me AR15/M4/M16 .223 5.56 Waterproof Durable Lower Decal Skin Kit -...
M: B+W 72mm XS-Pro Kaesemann Circular Polarizer with Multi-Resistant Nano Coating. Electronics. Camera & Photo. B + W.
N: ASUS PCI-Express x1 7.1 Channel Sound Card XONAR_DX/XD/A/90-YAA060-1UAN00Z. Electronics. Computers & Accessories. Asus.
O: ASUS Dual-Band AC750 wireless router 733 Mbps with USB port (RT-AC51U). Electronics. Computers & Accessories. Asus.
P: HONGYU 2016 New Ultrathin Built-in Speaker MP3 MP4 Music Player with 16GB storage and 1.8 Inch Screen / FM / e-book / Voice recorder /...
Q: Tonor Black 3 Port 1080p HDMI Switcher Splitter HUB Support 3D High Speed. Electronics. Accessories & Supplies. TONOR.
R: Sauder 415541 Beginnings 3-Shelf Bookcase, Soft White Finish. Home & Kitchen. Furniture. Sauder.
S: Intel DG33TL Media Series G33 uATX DDR2 800 Intel Graphics DVI+VGA 1333MHz FSB LGA775 Desktop Board - Retail. Electronics. Computers & Accessories. Intel.
T: Rosewill Computer Modular Power Supply, Modular 80 PLUS Gold 750W PSU for PC/Desktop/ Gaming Computer, Silent 135mm Fan, ATX12V/EPS12V, SLI & CrossFire Ready - CAPSTONE...


assistant
Answer: O