Instruction: Assess the user's sentiment in the provided review and select the appropriate sentiment option from the list as the answer.

Input:
Contrary to the Linksys product's documentation, and the information on the  product's website, this unit did NOT support Check Point VPN-1 SecuRemote client behind the unit's firewall. The DMZ function was also useless with my VPN client software. Linksys Tech. Support was completely helpless. // I purchsed an Asante' FR3004 and had it up and running and supporting my VPN client software in under 5 Mins. // I sold my Linksys unit to a friend who only needed functionality for standard websurfing and e-mail which the Linksys unit does support nicely. If you need advanced routing capabilities, this Linksys router probably should be avoided.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: D: negative