Which of the following software development methods is MOST applicable?

A company has received the contract to begin developing a new suite of software tools to replace
an aging collaboration solution. The original collaboration solution has been in place for nine
years, contains over a million lines of code, and took over two years to develop originally. The
SDLC has broken the primary delivery stages into eight different deliverables, with each section
requiring an in-depth risk analysis before moving on to the next phase. Which of the following
software development methods is MOST applicable?

A.
Spiral model

B.
Incremental model

C.
Waterfall model

D.
Agile model