Definitions:
Due diligence is the act of investigating and understanding the risks a company faces.
Due care is the development and implementation of policies and procedures to aid in protecting the company, its assets, and its people from threats

Explanation/Reference:

Quantitative assessments typically employ a set of methods, principles, or rules for assessing risk based on the use of numbers This type of assessment most effectively supports cost-benefit analyses of alternative risk responses or courses of action.