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: Rank the items in options and predict the user's next purchase from the listed options by analyzing her historical purchases.

Input:
Purchase History:
1st: Canon Speedlite 430EX II Flash for Canon Digital SLR Cameras Bulk Packaging (White Box, New). Electronics. Camera & Photo. Canon.
2nd: Fotodiox Macro Reverse Ring Camera Mount Adapter for using Canon EOS Camera with 52mm Filter Thread Lens. Electronics. Camera & Photo. Fotodiox.

Options:
A: Bushnell Elite Roof Prism Binoculars. Electronics. Camera & Photo. Bushnell.
B: Clubmaker Grip Solvent 1 Quart FE. Sports & Outdoors. Sports & Fitness. Clubmaker.
C: Canon EOS 50D DSLR Camera (Body Only) (Discontinued by Manufacturer). Electronics. Camera & Photo. Canon.
D: 1 X Incense-Gonesh Sticks-#4 Perfumes of Orchards and Vines. Home & Kitchen. Home Dcor. Gonesh.
E: Dyson Ball Allergy Upright Vacuum. Home & Kitchen. Vacuums & Floor Care. Dyson.
F: New Remote CT-8037 ct8037 fit for TOSHIBA 40L3400 40L3400U 50L3400 50L3400U 58L5400 58L5400U 58L5400UC 65L5400 65L5400U 65L5400UC Smart HDTV TV. Electronics. Accessories & Supplies. Vinabty.
G: CUTIE CUPCAKE JUNGLE SET/4. Home & Kitchen. Kitchen & Dining. Autumn Carpenter Designs Cutie.
H: Americanflat Document Frame-Made to Display Certificates, 8.5x11, White. Home & Kitchen. Home Dcor. Americanflat.
I: 2 X Genuine Beam Rugmaster Plus Belt. Home & Kitchen. Vacuums & Floor Care. Beam.
J: GROSCHE GLASGOW Glass Teapot with Infuser , 1000 ml 34 Fl Oz capacity. Home & Kitchen. Kitchen & Dining. GROSCHE.
K: Callaway X Hot Staff Bag, White/Black/Red. Sports & Outdoors. Sports & Fitness. Callaway.
L: IDE to SATA Serial ATA Converter Adapter. Electronics. Accessories & Supplies. Crazy Cart.
M: Council Tool 2.0 Hudson Bay Camp Axe with 28 Inch Curved Handle. Sports & Outdoors. Outdoor Recreation. COUNCIL.
N: Hidden Mini Camera Night Vision Dual USB Charger Camera Motion Detection Camera [1080P None WiFi HD Cam] Video Camera Remote View Live Camera Nanny Camera...
O: Ecoxgear Bluetooth Portable Audio System (orange). Electronics. Portable Audio & Video. ECOXGEAR.
P: Cosina 19-35mm f/3.5-4.5 MC AF Wide Angle Zoom Lens for Canon EOS / EF. Electronics. Camera & Photo. Cosina.
Q: Ameriwood Home Watson Entertainment Center with Reversible Back Panels, Black. Home & Kitchen. Furniture. Ameriwood Home.
R: Neewer 16"x16"/40cmx40cm Photography Photo Video Studio Wired Softbox Flash Light Lighting Diffuser with E27 Socket for Fluorescent Bulb Lamp. Electronics. Camera & Photo. Neewer.
S: Hinterland Trading Sugar Starfish for Decoration, Brown. Home & Kitchen. Home Dcor. Hinterland Trading.
T: 36v 36 volt Ez-go Golf Cart Battery Charger Powerwise Automatic. Sports & Outdoors. Sports & Fitness. EV Flex.


assistant
Answer: C