In recent years, scientists and doctors have made huge strides in treating killer diseases, but the cure for the common cold has remained out of reach.
(A) Scientists and doctors have found cures and treatment for many serious diseases including the common cold.
(B) There have been great progresses in treating severe illness except the treatment for the common cold.
(C) Many people have been killed by serious diseases, but the cures for them have remained impossible.
(D) In order to cure the common cold, scientists and doctors have developed different ways of treatment
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