She argued that the company and other social media sites ...

[fahad]

She argued that the company and other social media sites regularly engage in research, and that the practice
  is thus acceptable.
  A synonym for practice is
 
  a. abstention
  b. ignorance
  c. refrain
  d. custom

Question 2

They, in turn, need to teach not just right vs. wrong, but a way of negotiating ethical dilemmas so that their
  followers always act with integrity.
  An antonym for negotiating is
 
  a. blocking
  b. bargaining
  c. conferring
  d. trading

[perkiness]

Answer to Question 1

d. custom

Answer to Question 2

a. blocking

[fahad]

TYSM

[kthug]

Excellent