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: National Geographic NG 3030 Adventure Camera Strap (Khaki). Electronics. Camera & Photo. National Geographic.
2nd: Apple iPad 2 iPad 3 iPad 4 Drop Tech Black Gumdrop Cases Silicone Rugged Shock Absorbing Protective Dual Layer Cover Case. Electronics. Computers & Accessories...
3rd: Neewer 43-inch / 110cm 5-in-1 Collapsible Multi-Disc Light Reflector with Bag - Translucent, Silver, Gold, White and Black. Electronics. Camera & Photo. Neewer.
4th: Opteka GPN-1 Geotag GPS & Shutter Release Cord for Nikon D3, D3S, D3X, D4, D750, D700, D300, D300S, D2X, D2XS, D2HS, D200, D5000, D5100, D5200,...
5th: Tamrac S.A.S. Compact Filter Case (Black). Electronics. Camera & Photo. Tamrac.

Options:
A: Leegoal USB 13 LED Flexible Light Lamp for Laptop PC Notebook PC. Electronics. Computers & Accessories. Leegoal.
B: Hayabusa TM Waterproof Picnic Lunch Bag Tote Insulated Cooler Travel Zipper Organizer Box (Grid). Home & Kitchen. Kitchen & Dining. JASSINS.
C: Teagas Upgraded Solid Wood Chinese Kung Fu / Gongfu Tea Serving Tray for Chinese Teapot and Teacup Set. Home & Kitchen. Kitchen & Dining. Teagas.
D: Handicrunch Elephant Under Tree Tapestry, Indian Hippie Wall Hanging / Dorm Divider. Home & Kitchen. Home Dcor. Handicrunch.
E: No. 918 Anya Casual Textured Rod Pocket Curtain Panel, 40 x 95 Inch, Berry Red Ecot Stripe Print. Home & Kitchen. Home Dcor. No. 918.
F: FRIEQ Super Bubble Neoprene Sleeve Case Cover with Built-in Stand for iPad Mini 7.9"/Kindle Fire HD 7"/Nexus 7 - Gray. Electronics. Computers & Accessories. FRiEQ.
G: KingLinen 8 Piece Queen Azura Bamboo Flower Comforter Set. Home & Kitchen. Bedding. KingLinen.
H: Grand Epicure 7C8567 8 by 10 by 12-mm Safe Side Utility Board. Home & Kitchen. Kitchen & Dining. Grand Epicure.
I: iPad Mini 3 Case, Snugg - Smart Cover with Kick Stand & (Black Leather) for Apple iPad Mini 3 (2014). Electronics. Computers & Accessories. Snugg.
J: 3.5" USB 2.0 External Enclosure - Blue. Electronics. Computers & Accessories. Luxor Outlet.
K: 180Lb Crossbow Strings. Sports & Outdoors. Sports & Fitness. Master.
L: Reed & Barton 1482745000 Colton 45-Piece Flatware Set. Home & Kitchen. Kitchen & Dining. Reed & Barton.
M: Mahogany Solid-Color 100-Percent Cotton Hemstitch Napkin, 19-Inch by 19-Inch, Red, Set of 4. Home & Kitchen. Kitchen & Dining. Mahogany.
N: Artisan Filing Cabinet, 4 DRAWER, MACINTOSH OAK. Home & Kitchen. Furniture. Home Decorators Collection.
O: Linon 20155T36-01-KD-U Adirondack End, Teak Table. Home & Kitchen. Furniture. Linon.
P: Casual Home Shelf Bookcase. Home & Kitchen. Furniture. Casual Home.
Q: [2 Pack] Hydro Flask Handle, HamFire Paracord Survival Carrier Strap Cord for Hydro Flask Nalgene CamelBak Wide Mouth & Standard Mouth Water Bottles. Sports &...
R: Crown Royal Bottle Metal Sign. Home & Kitchen. Home Dcor. The Crown Royal Distilling Company.
S: Kingston Ultimate 16 GB 266x CompactFlash Memory Card CF/16GB-U2. Electronics. Computers & Accessories. Kingston.
T: Ubiquiti UniFi Switch 16 Managed PoE+ Gigabit Switch with SFP (US-16-150W). Electronics. Computers & Accessories. Ubiquiti Networks.


assistant
Answer: S