Which group of three of the following five statements (A-E) contain is all three correct statements regarding beri-beri?
(A) a crippling disease prevalant among the native population of sub-Saharan Africa;
(B) a deficiency disease caused by lack of thiamine (vitamin B₁)
(C) a nutritional disorder in infants and young children when the diet is persistently deficient in essential protein;
(D) occurs in those countries where the staple diet is polished rice;
(E) the symptoms are pain from neuritis, paralysis, muscle wasting, progressive oedema, mental deterioration and finally heart failure;