Which of the Following Choices Most Accurately Describes a Reason

Which of the following choices most accurately describes a reason for using professional networks such as LinkedIn?

A) Individuals who effectively utilize such networks tend to earn higher wages and get promoted faster than their peers.
B) Such professional networks enable individuals to stay in contact with their friends and ensure they get the jobs when openings arise.
C) Individuals may be able to leverage such networks to gain access to the knowledge and skills of other people.
D) These networks are generally free to use and thus, those individuals seeking to further their career should take advantage of them.