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: Based on the user's historical purchases, rank the items in options and predict the next product of the user's interest from the provided options.

Input:
Purchase History:
1st: Black Mountain Products Resistance Band Set with Door Anchor, Ankle Strap, Exercise Chart, and Carrying Case. Sports & Outdoors. Sports & Fitness. Black Mountain.
2nd: Victorinox Swiss Army Pocket Knife. Sports & Outdoors. Outdoor Recreation. Victorinox.

Options:
A: Otis Technology The Otis Elite. Sports & Outdoors. Sports & Fitness. Otis Technology.
B: Seaguar Abrazx ICE 50-Yards Fluorocarbon Fishing Line. Sports & Outdoors. Sports & Fitness. Seaguar.
C: High Sierra Moray 22L Hydration Pack. Sports & Outdoors. Outdoor Recreation. High Sierra.
D: Kastar EN-EL14 Charger Kit for Nikon ENEL14, EN-EL14a, MH-24 and Coolpix P7000, P7100, P7700, P7800, D3100 DSLR, D3200 DSLR, D3300 DSLR, D5100 DSLR, D5200 DSLR,...
E: KitchenAid 9709276 Replacement Lever- Parts. Home & Kitchen. Kitchen & Dining. KitchenAid.
F: Philips Picopix PPX2055/F7 Pico Projector, 55 Lumens, 4.1 Oz, USB for PC. Electronics. Video Projectors. Philips.
G: HyperGear 13279 Hi-Fi Stereo Headphones Over Ear Headset with Built-In Inline Microphone 3.5mm Cable, White. Electronics. Headphones. HyperGear.
H: Mustad UltraPoint Demon Perfect In-Line Circle 3 Extra Strong Hook (Pack of 25). Sports & Outdoors. Sports & Fitness. Mustad.
I: Ollieroo Fabric 2-Drawer Storage Organizer Dresser Home Organizer Bedside Table End Tables - Linen. Home & Kitchen. Furniture. Ollieroo.
J: Bissell 3106K Green Featherweight Stick Vacuum. Home & Kitchen. Vacuums & Floor Care. Bissell.
K: EasyAcc Power Bank Case for Anker PowerCore 10000mAh External Battery Pack Case for 10000mAh 1500mAh Portable Charger Case for Ultra-Compact High-speed Power Bank Bag Hard...
L: bling 3D leather case light blue peacock diamond rhinestone crystal hard Case cover for apple ipod touch 4 gen 4g 4th. Electronics. Portable Audio &...
M: ASUS NVIDIA GeForce 2GB DDR3 VGA/DVI/HDMI PCI-Express Video Card GT630-DCSL-2GD3. Electronics. Computers & Accessories. Asus.
N: Willert Home Products 400.30T Toilet Deodorizer, 3 oz. Home & Kitchen. Home Dcor. Willert Home Products.
O: Oriental Furniture Cotton Roman Shades - Light Green - (24 in. x 72 in.). Home & Kitchen. Home Dcor. ORIENTAL FURNITURE.
P: NEESHOW Carbon Steel Mold Nonstick For Cake Or Toast Making With A Lid-Black. Home & Kitchen. Kitchen & Dining. NEESHOW.
Q: Fotodiox Pro Plastic Rear Lens Cap for Hasselblad V-Mount SLR Lenses. Electronics. Camera & Photo. Fotodiox.
R: All-Star Traditional Mask Sun Visor. Sports & Outdoors. Sports & Fitness. All-Star.
S: Manual Grain Grinder for Dry and Oily Grains - Durable Kitchen Manual Grain Mill, Fast Hand Flour Mill and Spice Grinder Manual for Home Use...
T: Custom Ian Somerhalder Pillowcase Standard Size Design Cotton Pillow Case. Home & Kitchen. Bedding. PersonalizedPillowcase.


assistant
Answer: R