The Presently Accepted Model of Enzyme Action Was Proposed by Daniel

The presently accepted model of enzyme action was proposed by Daniel Koshland in the 1960s and suggested that the enzyme was a flexible structure with an active site roughly complementary to the substrate that binds it.After its initial interaction with the substrate,the enzyme alters its shape and thus improves the fit of the substrate in the active site) What is the name of this model?

A) The Induced Fit model
B) The Flexible Sponge model
C) The Lock and Key model
D) The Koshland model
E) The Flexible Fit model