Answer:
Option A - He pulled the United States out of these negotiations.
Step-by-step explanation:
President Trump had during the campaigns leading up to the elections, promised to pull the United States out of the ambitious deal being pursued by the Obama administration. He claimed that such deals were responsible for the migrations of companies and jobs meant for the American people.
He campaigned on the "America first" mantra, which propagated the message that such deals were not favorable to Americans.
He formally abandoned the Trans Pacific Partnership on the 23rd of January, 2017.