Answer:
The correct answer is letter "A": more sophisticated management tools were put in place to reduce project uncertainty.
Step-by-step explanation:
Aaron J. Shenhar and Dov Dvir in the book "Reinventing Project Management" (2007) propose the Diamond Approach to successful growth and innovation which uses four (4) bases the analyze projects aiming to provide a deeper understanding to all individuals involved in the venture. Those bases are novelty, technology, complexity, and pace.
The complexity base stated that the more the project expands in scope and size, the more sophisticated management tools would be necessary to reduce uncertainty. The higher the degree of complexity in a project, the higher the formality.