When Honda Automobiles First Entered the U

When Honda automobiles first entered the U.S.market,they were small and not very durable. However,over the years,Honda has modified its automobiles to be one of the most dependable cars on the market. This change in dependability and durability is representative of which type of product modification?

A) style modification
B) planned obsolescence
C) functional modification
D) quality extension
E) quality modification