In probability theory, the sample space of an experiment or random trial is the set of all possible outcomes or results of that experiment. A sample space is usually denoted using set notation, and the possible ordered outcomes are listed as elements in the set. It is common to refer to a sample space by the labels "S", Ω, or "U" (for "universal set").

Based on that paragraph can we conclude that this sentence is true?
Notations are something that can be set.

Options:
A). Yes.
B). It's impossible to say.
C). No.
A).