"Breathe" is a country pop song written and performed by American singer-songwriters Taylor Swift and Colbie Caillat. Produced by Nathan Chapman and Swift, it is the seventh track from Swift's second studio album, "Fearless" (2008). The song was written about the end of a friendship. Musically, the song is driven by acoustic guitar.
Can we infer the following?
Taylor Swift and Colbie Caillat are best friends in the industry.

(a). Yes.
(b). It's impossible to say.
(c). No.
The answer is:
(b).