Which revision best fixes the vague antecedent in this sentence?
 Rhea and Lynne have been best friends since grade school, but she
 just found out her family is moving away.
 A. Rhea and Lynne have been best friends since grade school, but
 they just found out her family is moving away.
 B. Rhea and Lynne have been best friends since grade school, but
 she just found out Lynne's family is moving away.
 C. They have been best friends since grade school, but Lynne just
 found out her family is moving away
 D. Rhea and Lynne have been best friends since grade school, but
 Lynne just found out her family is moving away.