From the sentence “mobile phones have only been popular since the 1990s", it is possibl...

a) Mobile phones were only popular in the 1990s

b) Mobile phones are more popular nowadays than in the 1990s.

c) Mobile phones were popular in the 1990s and are still popular these days.

d) Mobile phones were popular in the 1990s but their popularity has faded since then.

Responda: From the sentence “mobile phones have only been popular since the 1990s", it is possible to understand that: