Task: Sequential_Recommendation
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:
1st: InStep / Schwinn Bike Trailer Coupler Attachment. Sports & Outdoors. Outdoor Recreation. Instep.
2nd: BBTac M16-A4 Airsoft Gun Spring Rifle Shoots 6mm BBs Pellets with Accessories. Sports & Outdoors. Sports & Fitness. BBTac.

Options:
A: MSC International 96035 Joie Yolky Egg Separator, BPA-Free Silicone, 2.75 x 2-Inches. Home & Kitchen. Kitchen & Dining. MSC International.
B: AGPtek® 2.7" LCD Full HD 1080P Car Camera Dash Cam Vehicle DVR - Night Vision,120 degrees,G-sensor. Electronics. Car & Vehicle Electronics. AGPtek.
C: Lexar Media 512 MB Secure Digital Memory Card (Retail Package) SD512-231. Electronics. Camera & Photo. Lexar.
D: Dunfire Colorful Replacement Clip Holder for Fitbit Zip Wireless Activity Tracker. Electronics. Wearable Technology. Dunfire.
E: 3 Pack Magnetic Push Down Bottle Cap Opener by HQY, Silver (New Version). Home & Kitchen. Kitchen & Dining. HQY.
F: M MAXIMUMCATCH Maxcatch Tenkara Rod Telescoping Carbon Fly Fishing Pole with Storage Tube: 10ft/11ft/12ft/13ft.  M MAXIMUMCATCH.
G: Metra TYTO-01 JBL Amplifier Interface Harness. Electronics. Car & Vehicle Electronics. Axxess.
H: Blackout Curtain Beige Nickel Grommet Top Energy Saving Thermal Insulated 64 Inch Length Pair. Home & Kitchen. Home Dcor. Blackout Curtain.
I: PUR Pitcher Filter Replacements (6). Home & Kitchen. Kitchen & Dining. PUR.
J: Bobj Rugged Case for ASUS MeMO Pad 8 (ME181C, ME181CX, K011, MG8, MG181C, MG181CX) and ASUS VivoTab 8 (M81C, K01G) - BobjGear Custom Fit -...
K: HP ENVY 13-2150nr Spectre XT 13.3" Ultrabook (Silver). Electronics. Computers & Accessories. HP.
L: Coaster Home Furnishings 704419 Sofa Table, Dark Cherry/Antique White. Home & Kitchen. Furniture. Coaster Home Furnishings.
M: Kurt Adler Red and Green Candy Garland. Home & Kitchen. Seasonal Dcor. Kurt Adler.
N: PL 18 Inch Vintage Handmade Leather Messenger Bag for Laptop Briefcase Satchel Bag. Electronics. Computers & Accessories. Komal's Passion Leather.
O: UTG M3 Multi-Shot Shotgun Shell Cartridges. Sports & Outdoors. Sports & Fitness. UTG.
P: Shop4Omni Clip-On Utility Tray w Cup Holders A-Frame Gravity Recliner Chairs. Sports & Outdoors. Outdoor Recreation. Shop4Omni.
Q: Hed Bed Inflatable Travel Pillow. Home & Kitchen. Bedding. High Road.
R: SVBONY Telescopes Eyepieces 1.25" Lens 4mm Multi Coated Telescope Lens for Celestial Nebula Observations. Electronics. Camera & Photo. SVBONY.
S: Brown Paper Bag With Handle 13x7x17. Home & Kitchen. Kitchen & Dining. Nathan's.
T: HIFIMAN EF2A  USB Headphone Amplifier. Electronics. Accessories & Supplies. HIFIMAN.
Answer: O