The build environment of secure coding consists of some tools that actively support secure specification, design, and implementation. Which of the following features do these tools have? Each correct answer represents a complete solution. Choose all that apply.

A. They decrease the exploitable flaws and weaknesses.
B. They reduce and restrain the propagation, extent, and damage that have occurred by insecure software behavior.
C. They decrease the attack surface.
D. They employ software security constraints, protections, and services.
E. They decrease the level of type checking and program analysis.