Negotiations in the Uruguay and Doha Rounds Were Each Organized

Negotiations in the Uruguay and Doha Rounds were each organized as a "single undertaking," meaning that

A) the agreed goal of the negotiations was a single tariff rate for imported manufactured goods, agricultural goods, and services.
B) nothing was agreed until everything was agreed.
C) tariff rates would be harmonized across all WTO members.
D) WTO members pledged not to sign any other trade agreements during the Rounds.