In the text,“In fact” (l.12) means As a matter of fact.

(C)

Tanto ( In Fact) quanto ( As a matter of fact) fazem menção a palavra ( De fato)

in fact - de fato means(significa) As a matter of fact - na verdade.

Questão correta.

c-

In fact and as a matter of fact express similar meanings, only that their usage implies distinct contexts and discourse awareness. While one finds more use at formal settings, the other is more widely used for mostly everyday scenarios.

https://english.stackexchange.com/questions/208963/in-fact-in-point-of-fact-as-a-matter-of-fact