What did China agree to do once the Treaty of Nanjing was signed? Check all that apply.
eliminate all tariffs on imported goods
create a "fair and reasonable" tariff
allow Britain to trade at five ports
surrender the territory of Hong Kong
surrender the island of Taiwan

Because of the treaty of Nanjing, China had to pay the British an indemnity, ceded the territory of Hong Kong, and agreed to establish a “fair and reasonable” tariff. British merchants, who had previously been allowed to trade only at Guangzhou , were now permitted to trade at five “treaty ports” and with whomever they pleased

So your answer will be B, C, and D

A is inaccurate

E is wrong, because at this point in time, Taiwan was already an independent country and therefore, China wouldn't be able to surrender it since they didn't own it

Hope this helps