What is meant by the "induced fit" of an enzyme?

• A. The substrate can be altered so that it is induced to fit into the enzyme's active site.
• B. The enzyme structure is altered so that it can be induced to fit many different types of substrate.
• C. The presence of the substrate in solution induces the enzyme to slightly change its structure.
• D. The shape of the active site is nearly perfect for specifically binding the enzyme's substrate or substrates.
• E. The enzyme changes its shape slightly as the substrate binds to it.