Consider the following statements about the ethnic composition of Sri Lanka:
A. Major social groups are the Sinhala- speaking (74%) and Tamil-speaking (18%)?
B. Among the Tamils, there are two sub-groups, Sri Lankan Tamils and Indian Tamils.
C. There are about 7% Christians, who are both Tamil and Sinhala.
D. Most of the Sinhala-speaking are Hindus or Muslims and most of the Tamil-speaking are Buddhists.
Which of the above statements are correct?