The indication for the use of lingual plate major connector include.. When the lingual frenum is high or when there is a shallow lingual sulcus

The indication for the use of lingual plate major connector include:
a. For the purpose of retention.
b. When the lingual frenum is high or when there is a shallow lingual sulcus.
c. To prevent the movement of mandibular anterior teeth.
d. All of the above.***