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: UTG 2.4" Tactical Sunshade for 40MM Objedctive UTG Scopes. Sports & Outdoors. Sports & Fitness. UTG.
2nd: PHANTOM POLYMER TACTICAL CQB RETICLE MINI RED DOT REFLEX SIGHT RDA20 BLACK WITH PICATINNY MOUNT. Sports & Outdoors. Sports & Fitness. TMS.
3rd: Caldwell XLA Pivot Model Bipod.  Caldwell.
4th: Ade Advanced Optics Hunter's 13"-23" Heavy Duty Long Bipod + Free Picatinny Rail Adaptor. Sports & Outdoors. Sports & Fitness. Ade Advanced Optics.

Options:
A: Speck Products MB15AU-SEE-CLR 15-Inch Aluminum Unibody/Black Keyboard See Thru Case for MacBook (Clear). Electronics. Computers & Accessories. Speck.
B: Rock Solid Wholesale. Sports & Outdoors. Sports & Fitness. Rock Solid Wholesale.
C: Vortex Optics Viper Riflescope 50 mm Sunshade . Sports & Outdoors. Sports & Fitness. Vortex Optics.
D: SIENOC 90 degree Right Angle VGA Male to Female 15 Pin SVGA Converter Adapter Connector for LCD Monitor TV Connector … (VGA-VGA). Electronics. Computers &...
E: Fetco F54856280 Dennis Weathered White 8x10 Picture Frame, 8 x 10, White & Off/White. Home & Kitchen. Wall Art. Fetco Home Decor.
F: C-Shaped Coffee Table Cappuccino. Home & Kitchen. Furniture. Coaster Home Furnishings.
G: Sony HVLIRM Battery IR Light for DCR-DVD101, 201, 301, 105, 205, 305, 405, 505, DCR-HC21, 32 42, 26, 36, 46 & 96 Camcorders. Electronics. Camera...
H: Chicken Wire Napkin Ring, Set of 4. Home & Kitchen. Kitchen & Dining. Park Designs.
I: EVGA nVidia e-GeForce 6200LE 256 MB 256-P1-N400-LR. Electronics. Computers & Accessories. EVGA.
J: Tops Knives Leather Bushcraft Sheath. Sports & Outdoors. Sports & Fitness. TOPS Knives.
K: Derailleur Hanger fit for TREK remedy, liquid, navigator, GARY FISHER 6. Sports & Outdoors. Outdoor Recreation. CyclingZeal.
L: LG Electronics GSA-H55NK DVD+/-RW Dl 20X Securdisk with Nero 12X RAM Software (Black). Electronics. Computers & Accessories. LG.
M: New Era 39THIRTY Stretch Fit Cap. Sports & Outdoors. Fan Shop. New Era.
N: iLuv Compact USB-powered stereo speakers for Mac and PC laptop-Silver. Electronics. Computers & Accessories. iLuv.
O: Pearl Izumi Men's Pro Softshell Lite Glove. Sports & Outdoors. Outdoor Recreation. Pearl iZUMi.
P: Neewer 250W 5600K Bowens Mount Photo Stuido Flash Speedlite Strobe Light Monolight for Studio, Location and Portrait Photography EG-250B (US). Electronics. Camera & Photo. Neewer.
Q: I/Omagic External DVD +/- R/RW Drive (24x) w/ lightScribe Optical Drives|#14700365 IDVD24DLSE. Electronics. Computers & Accessories. IO/Magic.
R: Mr. Coffee Simple Brew 12-Cup Programmable Coffee Maker, White. Home & Kitchen. Kitchen & Dining. Mr. Coffee.
S: INBIKE 8 Joints Alloy Steel Folding Bike Lock Anti-Hydraulic with Mounting Bracket. Sports & Outdoors. Outdoor Recreation. INBIKE.
T: Incase CL56505 Slider Soft Touch Case for iPod Touch 4G - Black. Electronics. Portable Audio & Video. Incase Designs.


assistant
Answer: C