Read the text and determine if the sentence is true (see options at the end):

In mathematics, the Vitali–Carathéodory theorem is a result in real analysis that shows that, under the conditions stated below, integrable functions can be approximated in L from above and below by lower- and upper-semicontinuous functions, respectively. It is named after Giuseppe Vitali and Constantin Carathéodory.

Sentence: the Vitali–Carathéodory theorem is a solution in real analysis 
OPT:
[A]. Yes;
[B]. It's impossible to say;
[C]. No;
[A].