Amber has received a lucrative offer to purchase her shares in a closely held corporation. She is required to give her fellow shareholders an opportunity to acquire her shares at the same price offered by the outsider. What is the likely explanation for why is Amber required to do so?
A. A shareholders' agreement gives the remaining shareholders a right of first refusal.
B. A shareholders' agreement provides the legal elements for valuing the entity's shares.
C. The share structure prohibits the transfer of shares to outside parties.
D. The corporation is listed on an exchange as a publicly traded company.