What Was One Method Researchers Used to Present a Word

What was one method researchers used to present a word so that people would be conscious of it on some trials and not others?

A) They sometimes presented the word to people who were in a coma.
B) They sometimes hypnotized people and told them not to see the word.
C) They sometimes made the word too small and blurry to see.
D) They sometimes presented a masking pattern after the word.