Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.

A) So then why are not Silicon Valley entrepreneurs clamouring to decode the ancient wisdom?

B) The failure rate in finding a new drug is as high as 95%.

C) Because these once - thriving cultures are now reduced to an endangered tribe.

D) According to industry data, it takes $2.6 billion and, on average, fourteen years to develop a new drug.