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: Sigma 30mm F2.8 DN Lens for Sony E-mount Cameras (Black). Electronics. Camera & Photo. Sigma.
2nd: SilverStone Technology NUC/Monitor Arm Extension Bracket with VESA Mount Specification (MVA01). Electronics. Accessories & Supplies. SilverStone Technology.

Options:
A: ChargerCity Heavy Duty Flexible 20inch Aluminum Gooseneck Car Truck Fleet Seat Floor Bolt Tablet Mount for Apple iPad Air Pro Mini Microsoft Surface Pro/Book Verizon...
B: Canon MT-24EX Macro Twin Lite Flash for Canon Digital SLR Cameras. Electronics. Camera & Photo. Canon.
C: Flammi 20 Pack Heavy-Duty S Shaped Hooks Rustproof Black Finish Steel Kitchen S Type Hooks Hangers for Pans Pots Plants Bags Towels. Home & Kitchen...
D: Under Armour Women's UA Authentic 17" Capri. Sports & Outdoors. Sports & Fitness. Under Armour.
E: DeSantis Die Hard Ankle Rig Holster fits S&W M&P CPT 9/40. Sports & Outdoors. Sports & Fitness. DeSantis.
F: STK's Sony NP-FG1 Battery - 1400mAh for Sony Cybershot DSC-HX9V, DSC-HX5V, DSC-H70, DSC-HX7V, DSC-H55, DSC-WX10, DSC-H20, DSC-H50, DSC-W290, DSC-W55, DSC-H10, DSC-HX5, DSC-W120, DSC-W150, DSC-W220, DSC-W80,...
G: 21 inches EXTRA DEEP POCKET - 1000 Thread Count Egyptian Cotton Sheet Set, 1000TC, King, Solid Sage. Home & Kitchen. Bedding. BlowOut Bedding.
H: Light Bulb Salt and Pepper Glass Shaker Set. Home & Kitchen. Kitchen & Dining. Chefcaptain.
I: Tablet Case Cover,AGPTEK Slim Folio Stand Leather Protector for Barnes & Noble Nook Tablet/Nook Color, Black. Electronics. Computers & Accessories. AGPTEK.
J: GDSTIME 25mm x 25mm x 7mm 2507 5V DC Brushless Cooling Fan. Electronics. Computers & Accessories. GDSTIME.
K: VIZIO E320FI-B2 32-Inch 1080p 60Hz Smart LED TV (Refurbished). Electronics. Television & Video. VIZIO.
L: Otis .177-22 Rim-Fire Cleaning Kit. Sports & Outdoors. Sports & Fitness. Otis Technology.
M: Wire Storage Basket and Waste Bin – Copper Plated Metal Bin with Two Handles for Office, Bedroom, Living Room, Closet and More - by Designstyles...
N: Majestic Los Angeles Dodgers T-shirt. Sports & Outdoors. Fan Shop. Majestic.
O: Hamilton Beach 31506 Convection 6 Slice/Broiler Toaster Oven. Home & Kitchen. Kitchen & Dining. Hamilton Beach.
P: Aivica SH201 SDI to HDMI Converter,Support 3G-SDI / HD-SDI / SDI,Network Unlimited Extender for Monitors. Electronics. Accessories & Supplies. Aivica.
Q: Aquaboon 2PP-20B 1 Micron Big Blue Whole House Water Filter Sediment, 20-Inch, 2-Pack. Home & Kitchen. Kitchen & Dining. Aquaboon.
R: Ballistix Sport 16GB Kit (8GBx2) DDR3 1866 MT/s (PC3-14900) SODIMM 204-Pin Memory - BLS2K8G3N18AES4. Electronics. Computers & Accessories. Ballistix.
S: Pyrus Electronics 4gb Mp3 / mp4 / mp5 Player with 2.8 Inch Touch Screen and All Stainless Steel Casing. Electronics. Portable Audio & Video. Pyrus...
T: '47 MLB San Francisco Giants Linesman Cuff Knit Hat with Pom, One Size Fits Most, Black. Sports & Outdoors. Fan Shop. '47.


assistant
Answer: R